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[FreeBSD/FreeBSD.git] / contrib / sendmail / RELEASE_NOTES

                        SENDMAIL RELEASE NOTES
      $Id: RELEASE_NOTES,v 8.1340.2.9 2002/06/25 22:53:32 ca Exp $


This listing shows the version of the sendmail binary, the version
of the sendmail configuration files, the date of release, and a
summary of the changes in that release.

8.12.5/8.12.5   2002/06/25
        SECURITY: The DNS map can cause a buffer overflow if the user
                specifies a dns map using TXT records in the configuration
                file and a rogue DNS server is queried.  None of the
                sendmail supplied configuration files use this option hence
                they are not vulnerable.  Problem noted independently by
                Joost Pol of PINE Internet and Anton Rang of Sun Microsystems.
        Unprintable characters in responses from DNS servers for the DNS
                map type are changed to 'X' to avoid potential problems
                with rogue DNS servers.
        Require a suboption when setting the Milter option.  Problem noted
                by Bryan Costales.
        Do not silently overwrite command line settings for
                DirectSubmissionModifiers.  Problem noted by Bryan
                Costales.
        Prevent a segmentation fault when clearing the event list by
                turning off alarms before checking if event list is
                empty.  Problem noted by Allan E Johannesen of Worcester
                Polytechnic Institute.
        Close a potential race condition in transitioning a memory buffered
                file onto disk.  From Janani Devarajan of Sun Microsystems.
        Portability:
                Include paths.h on Linux systems running glibc 2.0 or later
                        to get the definition for _PATH_SENDMAIL, used by
                        rmail and vacation.  Problem noted by Kevin
                        A. McGrail of Peregrine Hardware.
                NOTE: Linux appears to have broken flock() again.  Unless
                        the bug is fixed before sendmail 8.13 is shipped,
                        8.13 will change the default locking method to
                        fcntl() for Linux kernel 2.4 and later.  You may
                        want to do this in 8.12 by compiling with
                        -DHASFLOCK=0.  Be sure to update other sendmail
                        related programs to match locking techniques.

8.12.4/8.12.4   2002/06/03
        SECURITY: Inherent limitations in the UNIX file locking model
                can leave systems open to a local denial of service
                attack.  Be sure to read the "FILE AND MAP PERMISSIONS"
                section of the top level README for more information.
                Problem noted by lumpy.
        Use TempFileMode (defaults to 0600) for the permissions of PidFile
                instead of 0644.
        Change the default file permissions for new alias database files
                from 0644 to 0640.  This can be overridden at compile time
                by setting the DBMMODE macro.
        Fix a potential core dump problem if the environment variable
                NAME is set.  Problem noted by Beth A. Chaney of
                Purdue University.
        Expand macros before passing them to libmilter.  Problem noted
                by Jose Marcio Martins da Cruz of Ecole Nationale
                Superieure des Mines de Paris.
        Rewind the df (message body) before truncating it when libmilter
                replaces the body of a message.  Problem noted by Gisle Aas
                of Active State.
        Change SMTP reply code for AUTH failure from 500 to 535 and the
                initial zero-length response to "=" per RFC 2554.  Patches
                from Kenneth Murchison of Oceana Matrix Ltd.
        Do not try to fix broken message/rfc822 MIME attachments by
                inserting a MIME-Version: header when MaxMimeHeaderLength
                is set and no 8 to 7 bit conversion is needed.  Based on
                patch from Rehor Petr of ICZ (Czech Republic).
        Do not log "did not issue MAIL/EXPN/VRFY/ETRN" if the connection
                is rejected anyway.  Noted by Chris Loelke.
        Mention the submission mail queue in the mailq man page.  Requested
                by Bill Fenner of AT&T.
        Set ${msg_size} macro when reading a message from the command line
                or the queue.
        Detach from shared memory before dropping privileges back to
                user who started sendmail.
        If AllowBogusHELO is set to false (default) then also complain if
                the argument to HELO/EHLO contains white space.  Suggested
                by Seva Gluschenko of Cronyx Plus.
        Allow symbolicly linked forward files in writable directory paths
                if both ForwardFileInUnsafeDirPath and
                LinkedForwardFileInWritableDir DontBlameSendmail options
                are set.  Problem noted by Werner Spirk of
                Leibniz-Rechenzentrum Munich.
        Portability:
                Operating systems that lack the ftruncate() call will not
                        be able to use Milter's body replacement feature.
                        This only affects Altos, Maxion, and MPE/iX.
                Digital UNIX 5.0 has changed flock() semantics to be
                        non-compliant.  Problem noted by Martin Mokrejs of
                        Charles University in Prague.
                The sparc64 port of FreeBSD 5.0 now supports shared
                        memory.
        CONFIG: FEATURE(`preserve_luser_host') needs the macro map.
                Problem noted by Andrzej Filip.
        CONFIG: Using 'local:' as a mailertable value with
                FEATURE(`preserve_luser_host') and LUSER_RELAY caused mail
                to be misaddressed.  Problem noted by Andrzej Filip.
        CONFIG: Provide a workaround for DNS based rejection lists that
                fail for AAAA queries.  Problem noted by Chris Boyd.
        CONFIG: Accept the machine's hostname as resolvable when checking
                the sender address.  This allows locally submitted mail to
                be accepted if the machine isn't connected to a nameserver
                and doesn't have an /etc/hosts entry for itself.  Problem
                noted by Robert Watson of the TrustedBSD Project.
        CONFIG: Use deferred expansion for checking the ${deliveryMode}
                macro in case the SMTP VERB command is used.  Problem
                noted by Bryan Costales.
        CONFIG: Avoid a duplicate '@domain' virtusertable lookup if no
                matches are found.  Fix from Andrzej Filip.
        CONFIG: Fix wording in default dnsbl rejection message.  Suggested
                by Lou Katz of Metron Computerware, Ltd.
        CONFIG: Add mailer cyrusv2 for Cyrus V2.  Contributed by
                Kenneth Murchison of Oceana Matrix Ltd.
        CONTRIB: Fix wording in default dnsblaccess rejection message to
                match dnsbl change.
        DEVTOOLS: Add new option for access mode of statistics file,
                confSTMODE, which specifies the permissions when initially
                installing the sendmail statistics file.
        LIBMILTER: Mark the listening socket as close-on-exec in case
                a user's filter starts other applications.
        LIBSM: Allow the MBDB initialize, lookup, and/or terminate
                functions in SmMbdbTypes to be set to NULL.
        MAKEMAP: Change the default file permissions for new databases from
                0644 to 0640.  This can be overridden at compile time
                by setting the DBMMODE macro.
        SMRSH: Fix man page bug: replace SMRSH_CMDBIN with SMRSH_CMDDIR.
                Problem noted by Dave Alden of Ohio State University.
        VACATION: When listing the vacation database (-l), don't show
                bogus timestamps for excluded (-x) addresses.  Problem
                noted by Bryan Costales.
        New Files:
                cf/mailer/cyrusv2.m4

8.12.3/8.12.3   2002/04/05
        NOTICE: In general queue files should not be moved if queue groups
                are used.  In previous versions this could cause mail
                not to be delivered if a queue file is repeatedly moved
                by an external process whenever sendmail moved it back
                into the right place.  Some precautions have been taken
                to avoid moving queue files if not really necessary.
                sendmail may use links to refer to queue files and it
                may store the path of data files in queue files.  Hence
                queue files should not be moved unless those internals
                are understood and the integrity of the files is not
                compromised.  Problem noted by Anne Bennett of Concordia
                University.
        If an error mail is created, and the mail is split across different
                queue directories, and SuperSafe is off, then write the mail
                to disk before splitting it, otherwise an assertion is
                triggered.  Problem tracked down by Henning Schmiedehausen
                of INTERMETA.
        Fix possible race condition that could cause sendmail to forget
                running queues.  Problem noted by Jeff Wasilko of smoe.org.
        Handle bogus qf files better without triggering assertions.
                Problem noted by Guy Feltin.
        Protect against interrupted select() call when enforcing Milter
                read and write timeouts.  Patch from Gurusamy Sarathy of
                ActiveState.
        Matching queue IDs with -qI should be case sensitive.  Problem
                noted by Anne Bennett of Concordia University.
        If privileges have been dropped, don't try to change group ID to
                the RunAsUser group.  Problem noted by Neil Rickert of
                Northern Illinois University.
        Fix SafeFileEnvironment path munging when the specified path
                contains a trailing slash.  Based on patch from Dirk Meyer
                of Dinoex.
        Do not limit sendmail command line length to SM_ARG_MAX (usually
                4096).  Problem noted by Allan E Johannesen of Worcester
                Polytechnic Institute.
        Clear full name of sender for each new envelope to avoid bogus data
                if several mails are sent in one session and some of them
                do not have a From: header.  Problem noted by Bas Haakman.
        Change timeout check such that cached information about a connection
                will be immediately invalid if ConnectionCacheTimeout is zero.
                Based on patch from David Burns of Portland State University.
        Properly count message size for mailstats during mail collection.
                Problem noted by Werner Wiethege.
        Log complete response from LMTP delivery agent on failure.  Based on
                patch from by Motonori Nakamura of Kyoto University.
        Provide workaround for getopt() implementations that do not catch
                missing arguments.
        Fix the message size calculation if the message body is replaced by
                a milter filter and buffered file I/O is being used.
                Problem noted by Sergey Akhapkin of Dr.Web.
        Do not honor SIGUSR1 requests if running with extra privileges.
                Problem noted by Werner Wiethege.
        Prevent a file descriptor leak on mail delivery if the initial
                connect fails and DialDelay is set.  Patch from Servaas
                Vandenberghe of Katholieke Universiteit Leuven.
        Properly deal with a case where sendmail is called by root running
                a set-user-ID (non-root) program.  Problem noted by Jon
                Lusky of ISS Atlanta.
        Avoid leaving behind stray transcript (xf) files if multiple queue
                directories are used and mail is sent to a mailing list
                which has an owner- alias.  Problem noted by Anne Bennett
                of Concordia University.
        Fix class map parsing code if optional key is specified.  Problem
                found by Mario Nigrovic.
        The SMTP daemon no longer tries to fix up improperly dot-stuffed
                incoming messages.  A leading dot is always stripped by the
                SMTP receiver regardless of whether or not it is followed by
                another dot.  Problem noted by Jordan Ritter of darkridge.com.
        Fix corruption when doing automatic MIME 7-bit quoted-printable or
                base64 encoding to 8-bit text.  Problem noted by Mark
                Elvers.
        Correct the statistics gathered for total number of connections.
                Instead of being the exact same number as the total number
                of messages (T line in mailstats) it now represents the
                total number of TCP connections.
        Be more explicit about syntax errors in addresses, especially
                non-ASCII characters, and properly create DSNs if necessary.
                Problem noted by Leena Heino of the University of Tampere.
        Prevent small timeouts from being lost on slow machines if itimers
                are used.  Problem noted by Suresh Ramasubramanian.
        Prevent a race condition on child cleanup for delivery to files.
                Problem noted by Fletcher Mattox of the University of
                Texas.
        Change the SMTP error code for temporary map failures from 421
                to 451.
        Do not assume that realloc(NULL, size) works on all OS (this was
                only done in one place: queue group creation).  Based on
                patch by Bryan Costales.
        Initialize Timeout.iconnect in the code to prevent randomly short
                timeouts.  Problem noted by Bradley Watts of AT&T Canada.
        Do not try to send a second SMTP QUIT command if the remote
                responds to a MAIL command with a 421 reply or on I/O
                errors.  By doing so, the host was marked as having a
                temporary problem and other mail destined for that host was
                queued for the next queue run.  Problem noted by Fletcher
                Mattox of the University of Texas, Allan E Johannesen of
                Worcester Polytechnic Institute, Larry Greenfield of CMU,
                and Neil Rickert of Northern Illinois University.
        Ignore error replies from the SMTP QUIT command (including servers
                which drop the connection instead of responding to the
                command).
        Portability:
                Check LDAP_API_VERSION to determine if ldap_memfree() is
                        available.
                Define HPUX10 when building on HP-UX 10.X.  That platform
                        now gets the proper _PATH_SENDMAIL and SMRSH_CMDDIR
                        settings.  Patch from Elias Halldor Agustsson of
                        Skyrr.
                Fix dependency building on Mac OS X and Darwin.  Problem
                        noted by John Beck.
                Preliminary support for the sparc64 port of FreeBSD 5.0.
                Add /sbin/sh as an acceptable user shell on HP-UX.  From
                        Rajesh Somasund of Hewlett-Packard.
        CONFIG: Add FEATURE(`authinfo') to allow a separate database for
                SMTP AUTH information.  This feature was actually added in
                8.12.0 but a release note was not included.
        CONFIG: Do not bounce mail if FEATURE(`ldap_routing')'s bounce
                parameter is set and the LDAP lookup returns a temporary
                error.
        CONFIG: Honor FEATURE(`relay_hosts_only') when using
                FEATURE(`relay_mail_from', `domain').  Problem noted by
                Krzysztof Oledzki.
        CONFIG: FEATURE(`msp') now disables any type of alias
                initialization as aliases are not needed for the MSP.
        CONFIG: Allow users to override RELAY_MAILER_ARGS when FEATURE(`msp')
                is in use.  Patch from Andrzej Filip.
        CONFIG: FEATURE(`msp') uses `[localhost]' as default instead of
                `localhost' and turns on MX lookups for the SMTP mailers.
                This will only have an effect if a parameter is specified,
                i.e., an MX lookup will be performed on the hostname unless
                it is embedded in square brackets.  Problem noted by
                Theo Van Dinter of Collective Technologies.
        CONFIG: Set confTIME_ZONE to USE_TZ in submit.mc (TimeZoneSpec= in
                submit.cf) to use $TZ for time stamps.  This is a compromise
                to allow for the proper time zone on systems where the
                default results in misleading time stamps. That is, syslog
                time stamps and Date headers on submitted mail will use the
                user's $TZ setting.  Problem noted by Mark Roth of the
                University of Illinois at Urbana-Champaign, solution proposed
                by Neil Rickert of Northern Illinois University.
        CONFIG: Mac OS X (Darwin) ships with mail.local as non-set-user-ID
                binary.  Adjust local mailer flags accordingly.  Problem
                noted by John Beck.
        CONTRIB: Add a warning to qtool.pl to not move queue files around
                if queue groups are used.
        CONTRIB: buildvirtuser: Add -f option to force rebuild.
        CONTRIB: smcontrol.pl: Add -f option to specify control socket.
        CONTRIB: smcontrol.pl: Add support for 'memdump' command.
                Suggested by Bryan Costales.
        DEVTOOLS: Add dependency generation for test programs.
        LIBMILTER: Remove conversion of port number for the socket
                structure that is passed to xxfi_connect().  Notice:
                this fix requires that sendmail and libmilter both have
                this change; mixing versions may lead to wrong port
                values depending on the endianness of the involved systems.
                Problem noted by Gisle Aas of ActiveState.
        LIBMILTER: If smfi_setreply() sets a custom reply code of '4XX' but
                SMFI_REJECT is returned, ignore the custom reply.  Do the
                same if '5XX' is used and SMFI_TEMPFAIL is returned.
        LIBMILTER: Install include files in ${INCLUDEDIR}/libmilter/ as
                required by mfapi.h.  Problem noted by Jose Marcio Martins
                da Cruz of Ecole Nationale Superieure des Mines de Paris.
        LIBSM: Add SM_CONF_LDAP_MEMFREE as a configuration define.  Set
                this to 1 if your LDAP client libraries include
                ldap_memfree().
        LIBSMDB: Avoid a file creation race condition for Berkeley DB 1.X
                and NDBM on systems with the O_EXLOCK open(2) flag.
        SMRSH: Fix compilation problem on some operating systems.  Problem
                noted by Christian Krackowizer of schuler technodat GmbH.
        VACATION: Allow root to operate on user vacation databases.  Based
                on patch from Greg Couch of the University of California,
                San Francisco.
        VACATION: Don't ignore -C option.  Based on patch by Bryan Costales.
        VACATION: Clarify option usage in the man page.  Problem noted by
                Joe Barbish.
        New Files:
                libmilter/docs/smfi_setbacklog.html

8.12.2/8.12.2   2002/01/13
        Don't complain too much if stdin, stdout, or stderr are missing
                at startup, only log an error message.
        Fix potential problem if an unknown operation mode (character
                following -b) has been specified.
        Prevent purgestat from looping even if someone changes the
                permissions or owner of hoststatus files.  Problem noted
                by Kari Hurtta of the Finnish Meteorological Institute.
        Properly record dropped connections in persistent host status.
                Problem noted by Ulrich Windl of the Universitat
                Regensburg.
        Remove newlines from recipients read via sendmail -t to prevent
                SMTP protocol errors when sending the RCPT command.
                Problem noted by William D. Colburn of the New Mexico
                Institute of Mining and Technology.
        Only log milter body replacements once instead of for each body
                chunk sent by a filter.  Problem noted by Kari Hurtta of
                the Finnish Meteorological Institute.
        In 8.12.0 and 8.12.1, the headers were mistakenly not included in
                the message size calculation.  Problem noted by Kari Hurtta
                of the Finnish Meteorological Institute.
        Since 8.12 no longer forks at the SMTP MAIL command, the daemon
                needs to collect children status to avoid zombie processes.
                Problem noted by Chris Adams of HiWAAY Informations Services.
        Shut down "nullserver" and ETRN-only connections after 25 bad
                commands are issued.  This makes it consistent with normal
                SMTP connections.
        Avoid duplicate logging of milter rejections.  Problem noted by
                William D. Colburn of the New Mexico Institute of Mining
                and Technology.
        Error and delay DSNs were being sent to postmaster instead of the
                message sender if the sender had used a deprecated RFC822
                source route.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        Fix FallbackMXhost behavior for temporary errors during address
                parsing.  Problem noted by Jorg Bielak from Coastal Web
                Online.
        For systems on which stat(2) does not return a value for st_blksize
                that is the "optimal blocksize for I/O" three new compile
                time flags are available: SM_IO_MAX_BUF_FILE, SM_IO_MIN_BUF,
                and SM_IO_MAX_BUF, which define an upper limit for
                regular files, and a lower and upper limit for other file
                types, respectively.
        Fix a potential deadlock if two events are supposed to occur at
                exactly the same time.  Problem noted by Valdis Kletnieks
                of Virginia Tech.
        Perform envelope splitting for aliases listed directly in the
                alias file, not just for include/.forward files.
                Problem noted by John Beck of Sun Microsystems.
        Allow selection of queue group for mailq using -qGgroup.
                Based on patch by John Beck of Sun Microsystems.
        Make sure cached LDAP connections used my multiple maps in the same
                process are closed.  Patch from Taso N. Devetzis.
        If running as root, allow reading of class files in protected
                directories.  Patch from Alexander Talos of the University
                of Vienna.
        Correct a few LDAP related memory leaks.  Patch from David Powell
                of Sun Microsystems.
        Allow specification of an empty realm via the authinfo ruleset.
                This is necessary to interoperate as an SMTP AUTH client
                with servers that do not support realms when using
                CRAM-MD5.  Problem noted by Bjoern Voigt of TU Berlin.
        Avoid a potential information leak if AUTH PLAIN is used and the
                server gets stuck while processing that command.  Problem
                noted by Chris Adams from HiWAAY Informations Services.
        In addition to printing errors when parsing recipients during
                command line invocations log them to make it simpler
                to understand possible DSNs to postmaster.
        Do not use FallbackMXhost on mailers which have the F=0 flag set.
        Allow local mailers (F=l) to specify a host for TCP connections
                instead of forcing localhost.
        Obey ${DESTDIR} for installation of the client mail queue and
                submit.cf.  Patch from Peter 'Luna' Runestig.
        Re-enable support for -M option which was broken in 8.12.1.  Problem
                noted by Neil Rickert of Northern Illinois University.
        If a remote server violates the SMTP standard by unexpectedly
                dropping the connection during an SMTP transaction, stop
                sending commands.  This prevents bogus "Bad file number"
                recipient status.  Problem noted by Allan E Johannesen of
                Worcester Polytechnic Institute.
        Do not use a size estimate of 100 for postmaster bounces, it's
                almost always too small; do not guess the size at all.
        New VENDOR_DEC for Compaq/DEC.  Requested by James Seagraves of
                Compaq Computer Corp.
        Fix DaemonPortOptions IPv6 address parsing such that ::1 works
                properly.  Problem noted by Valdis Kletnieks of Virginia
                Tech.
        Portability:
                Fix IPv6 network interface probing on HP-UX 11.X.  Based on
                        patch provided by HP.
                Mac OS X (aka Darwin) has a broken setreuid() call, but a
                        working seteuid() call.  From Daniel J. Luke.
                Use proper type for a 32-bit integer on SINIX.  From Ganu
                        Sachin of Siemens.
                Set SM_IO_MIN_BUF (4K) and SM_IO_MAX_BUF (8K) for HP-UX.
                Reduce optimization from +O3 to +O2 on HP-UX 11.  This
                        fixes a problem that caused additional bogus
                        characters to be written to the qf file.  Problem
                        noted by Tapani Tarvainen.
                Set LDA_USE_LOCKF by default for UnixWare.  Problem noted
                        by Boyd Lynn Gerber.
                Add support for HP MPE/iX.  See sendmail/README for port
                        information.  From Mark Bixby of Hewlett-Packard.
                New portability defines HASNICE, HASRRESVPORT, USE_ENVIRON,
                        USE_DOUBLE_FORK, and NEEDLINK.  See sendmail/README
                        for more information.  From Mark Bixby of
                        Hewlett-Packard.
                If an OS doesn't have a method of finding free disk space
                        (SFS_NONE), lie and say there is plenty of space.
                        From Mark Bixby of Hewlett-Packard.
                Add support for AIX 5.1.  From Valdis Kletnieks of
                        Virginia Tech.
                Fix man page location for NeXTSTEP.  From Hisanori Gogota
                        of the NTT/InterCommunication Center.
                Do not assume that strerror() always returns a string.
                        Problem noted by John Beck of Sun Microsystems.
        CONFIG: Add OSTYPE(freebsd5) for FreeBSD 5.X, which has removed
                UUCP from the base operating system.  From Mark Murray of
                FreeBSD Services, Ltd.
        CONFIG: Add OSTYPE(mpeix) and a generic .mc file for HP MPE/iX
                systems.  From Mark Bixby of Hewlett-Packard.
        CONFIG: Add support for selecting a queue group for all mailers.
                Based on proposal by Stephen L. Ulmer of the University of
                Florida.
        CONFIG: Fix error reporting for compat_check.m4.  Problem noted by
                Altin Waldmann.
        CONFIG: Do not override user selections for confRUN_AS_USER and
                confTRUSTED_USER in FEATURE(msp).  From Mark Bixby of
                Hewlett-Packard.
        LIBMILTER: Fix bug that prevented the removal of a socket after
                libmilter terminated.  Problem reported by Andrey V. Pevnev
                of MSFU.
        LIBMILTER: Fix configuration error that required libsm for linking.
                Problem noted by Kari Hurtta of the Finnish Meteorological
                Institute.
        LIBMILTER: Portability fix for OpenUNIX.  Patch from Larry Rosenman.
        LIBMILTER: Fix a theoretical memory leak and a possible attempt
                to free memory twice.
        LIBSM: Fix a potential segmentation violation in the I/O library.
                Problem found and analyzed by John Beck and Tim Haley
                of Sun Microsystems.
        LIBSM: Do not clear the LDAP configuration information when
                terminating the mailbox database connection in the LDAP
                example code.  Problem noted by Nikos Voutsinas of the
                University of Athens.
        New Files:
                cf/cf/generic-mpeix.cf
                cf/cf/generic-mpeix.mc
                cf/ostype/freebsd5.m4
                cf/ostype/mpeix.m4
                devtools/OS/AIX.5.1
                devtools/OS/MPE-iX
                include/sm/os/sm_os_mpeix.h
                libsm/mpeix.c

8.12.1/8.12.1   2001/10/01
        SECURITY: Check whether dropping group privileges actually succeeded
                to avoid possible compromises of the mail system by
                supplying bogus data.  Add configuration options for
                different set*gid() calls to reset saved gid.  Problem
                found by Michal Zalewski.
        PRIVACY: Prevent information leakage when sendmail has extra
                privileges by disabling debugging (command line -d flag)
                during queue runs and disabling ETRN when sendmail -bs is
                used.  Suggested by Michal Zalewski.
        Avoid memory corruption problems resulting from bogus .cf files.
                Problem found by Michal Zalewski.
        Set the ${server_addr} macro to name of mailer when doing LMTP
                delivery.  LMTP systems may offer SMTP Authentication or
                STARTTLS causing sendmail to use this macro in rulesets.
        If debugging is turned on (-d0.10) print not just the default
                values for configuration file and pid file but also the
                selected values.  Problem noted by Brad Chapman.
        Continue dealing with broken nameservers by ignoring SERVFAIL
                errors returned on T_AAAA (IPv6) lookups at delivery time
                if ResolverOptions=WorkAroundBrokenAAAA is set.  Previously
                this only applied to hostname canonification.  Problem
                noted by Bill Fenner of AT&T Research.
        Ignore comments in NIS host records when trying to find the
                canonical name for a host.
        When sendmail has extra privileges, limit mail submission command
                line flags (i.e., -G, -h, -F, etc.)  to mail submission
                operating modes (i.e., -bm, -bs, -bv, etc.).  Idea based on
                suggestion from Michal Zalewski.
        Portability:
                AIX: Use `oslevel` if available to determine OS version.
                        `uname` does not given complete information.
                        Problem noted by Keith Neufeld of the Cessna
                        Aircraft Company.
                OpenUNIX: Use lockf() for LDA delivery (affects mail.local).
                        Problem noticed by Boyd Lynn Gerber of ZENEX.
                Avoid compiler warnings by not using pointers to pass
                        integers.  Problem noted by Todd C. Miller of
                        Courtesan Consulting.
        CONFIG: Add restrictqrun to PrivacyOptions for the MSP to minimize
                problems with potential misconfigurations.
        CONFIG: Fix comment showing default value of MaxHopCount.  Problem
                noted by Greg Robinson of the Defence Science and
                Technology Organisation of Australia.
        CONFIG: dnsbl: If an argument specifies an error message in case
                of temporary lookup failures for DNS based blacklists
                then use it.
        LIBMILTER: Install mfdef.h, required by mfapi.h.  Problem noted by
                Richard A. Nelson of Debian.
        LIBMILTER: Add __P definition for OS that lack it.  Problem noted
                by Chris Adams from HiWAAY Informations Services.
        LIBSMDB: Fix a lock race condition that affects makemap, praliases,
                and vacation.
        MAKEMAP: Avoid going beyond the end of an input line if it does
                not contain a value for a key.  Based on patch from
                Mark Bixby from Hewlett-Packard.
        New Files:
                test/Build
                test/Makefile
                test/Makefile.m4
                test/README
                test/t_dropgid.c
                test/t_setgid.c
        Deleted Files:
                include/sm/stdio.h
                include/sm/sysstat.h

8.12.0/8.12.0   2001/09/08
        *NOTICE*: The default installation of sendmail does not use
                set-user-ID root anymore.  You need to create a new user and
                a new group before installing sendmail (both called smmsp by
                default).  The installation process tries to install
                /etc/mail/submit.cf and creates /var/spool/clientmqueue by
                default.  Please see sendmail/SECURITY for details.
        SECURITY: Check for group and world writable forward and :include:
                files.  These checks can be turned off if absolutely
                necessary using the DontBlameSendmail option and the new
                flags:
                        GroupWritableForwardFile
                        WorldWritableForwardFile
                        GroupWritableIncludeFile
                        WorldWritableIncludeFile
                Problem noted by Slawek Zak of Politechnika Warszawska,
        SECURITY: Drop privileges when using address test mode.  Suggested
                by Michal Zalewski of the "Internet for Schools" project
                (IdS).
        Fixed problem of a global variable being used for a timeout jump
                point where the variable could become overused for more than
                one timeout concurrently.  This erroneous behavior resulted in
                a corrupted stack causing a core dump.  The timeout is now
                handled via libsm.  Problem noted by Michael Shapiro,
                John Beck, and Carl Smith of Sun Microsystems.
        If sendmail is set-group-ID then that group ID is used for permission
                checks (group ID of RunAsUser).  This allows use of a
                set-group-ID sendmail binary for initial message submission
                and no set-user-ID root sendmail is needed.  For details
                see sendmail/SECURITY.
        Log a warning if a non-trusted user changes the syslog label.
                Based on notice from Bryan Costales of SL3D, Inc.
        If sendmail is called for initial delivery, try to use submit.cf
                with a fallback of sendmail.cf as configuration file.  See
                sendmail/SECURITY.
        New configuration file option UseMSP to allow group writable queue
                files if the group is the same as that of a set-group-ID
                sendmail binary.  See sendmail/SECURITY.
        The .cf file is chosen based on the operation mode. For -bm (default),
                -bs, and -t it is submit.cf if it exists for all others it
                is sendmail.cf (to be backward compatible).  This selection
                can be changed by the new option -Ac or -Am (alternative .cf
                file: client or mta).  See sendmail/SECURITY.
        The SMTP server no longer forks on each MAIL command.  The ONEX
                command has been removed.
        Implement SMTP PIPELINING per RFC 2920.  It can be turned off
                at compile time or per host (ruleset).
        New option MailboxDatabase specifies the type of mailbox database
                used to look up local mail recipients; the default value
                is "pw", which means to use getpwnam().  New mailbox database
                types can be added by adding custom code to libsm/mbdb.c.
        Queue file names are now 15 characters long, rather than 14 characters
                long, to accomodate envelope splitting.  File systems with
                a 14 character file name length limit are no longer
                supported.
        Recipient list used for delivery now gets internally ordered by
                hostsignature (character string version of MX RR).  This orders
                recipients for the same MX RR's together meaning smaller
                portions of the list need to be scanned (instead of the whole
                list) each delivery() pass to determine piggybacking.  The
                significance of the change is better the larger the recipient
                list.  Hostsignature is now created during recipient list
                creation rather than just before delivery.
        Enhancements for more opportunistic piggybacking.  Previous
                piggybacking (called coincidental) extended to coattail
                piggybacking.  Rather than complete MX RR matching
                (coincidental) piggybacking is done if just the lowest value
                preference matches (coattail).
        If sendmail receives a temporary error on a RCPT TO: command, it will
                try other MX hosts if available.
        DefaultAuthInfo can contain a list of mechanisms to be used for
                outgoing (client-side) SMTP Authentication.
        New modifier 'A' for DaemonPortOptions/ClientPortOptions to disable
                AUTH (overrides 'a' modifier in DaemonPortOptions).  Based
                on patch from Lyndon Nerenberg of Messaging Direct.
        Enable AUTH mechanism EXTERNAL if STARTTLS is used.
        A new ruleset authinfo can be used to return client side
                authentication information for AUTH instead of DefaultAuthInfo.
                Therefore the DefaultAuthInfo option is deprecated and will be
                removed in future versions.
        Accept any SMTP continuation code 3xy for AUTH even though RFC 2554
                requires 334.  Mercury 1.48 is a known offender.
        Add new option AuthMaxBits to limit the overall encryption strength
                for the security layer in SMTP AUTH (SASL).  See
                doc/op/op.me for details.
        Introduce new STARTTLS related macros {cn_issuer}, {cn_subject},
                {cert_md5} which hold the CN (common name) of the CA that
                signed the presented certificate, the CN and the MD5 hash
                of the presented certificate, respectively.
        New ruleset try_tls to decide whether to try (as client) STARTTLS.
        New ruleset srv_features to enable/disable certain features in the
                server per connection.  See doc/op/op.me for details.
        New ruleset tls_rcpt to decide whether to send e-mail to a particular
                recipient; useful to decide whether a conection is secure
                enough on a per recipient basis.
        New option TLSSrvOptions to modify some aspects of the server
                for STARTTLS.
        If no certificate has been requested, the macro {verify} has the
                value "NOT".
        New M=S modifier for ClientPortOptions/DaemonPortOptions to turn off
                using/offering STARTTLS when delivering/receiving e-mail.
        Macro expand filenames/directories for certs and keys in the .cf file.
                Proposed by Neil Rickert of Northern Illinois University.
        Generate an ephemeral RSA key for a STARTTLS connection only if
                really required.  This change results in a noticable
                performance gains on most machines.  Moreover, if shared
                memory is in use, reuse the key several times.
        Add queue groups which can be used to group queue directories with
                the same behavior together.  See doc/op/op.me for details.
        If the new option FastSplit (defaults to one) has a value greater
                than zero, it suppresses the MX lookups on addresses when they
                are initially sorted which may result in faster envelope
                splitting.  If the mail is submitted directly from the
                command line, then the value also limits the number of
                processes to deliver the envelopes; if more envelopes are
                created they are only queued up and must be taken care of
                by a queue run.
        The check for 'enough disk space' now pays attention to which file
                system each queue directory resides in.
        All queue runners can be cleanly terminated via SIGTERM to parent.
        New option QueueFileMode for the default permissions of queue files.
        Add parallel queue runner code.  Allows multiple queue runners per work
                group (one or more queues in a multi-queue environment
                collected together) to process the same work list at the
                same time.
        Option MaxQueueChildren added to limit the number of concurrently
                active queue runner processes.
        New option MaxRunnersPerQueue to specify the maximum number of queue
                runners per queue group.
        Queue member selection by substring pattern matching now allows
                the pattern to be negated.  For -qI, -qR and -qS it is
                permissible for -q!I, -q!R and -q!S to mean remove members
                of the queue that match during processing.
        New -qp[time] option is similar to -qtime, except that instead of
                periodically forking a child to process the queue, a single
                child is forked for each queue that sleeps between queue
                runs.  A SIGHUP signal can be sent to restart this
                persistent queue runner.
        The SIGHUP signal now restarts a timed queue run process (i.e., a
                sendmail process which only runs the queue at an interval:
                sendmail -q15m).
        New option NiceQueueRun to set the priority of queue runners.
                Proposed by Thom O'Connor.
        sendmail will run the queue(s) in the background when invoked with -q
                unless the new -qf option or -v is used.
        QueueSortOrder=Random sorts the queue randomly, which is useful if
                several queue runners are started by hand to avoid contention.
        QueueSortOrder=Modification sorts the queue by the modification time
                of the qf file (older entries first).
        Support Deliver By SMTP Service Extension (RFC 2852) which allows
                a client to specify an amount of time within which an e-mail
                should be delivered.  New option DeliverByMin added to set the
                minimum amount of time or disable the extension.
        Non-printable characters (ASCII: 0-31, 127) in mailbox addresses are
                not allowed unless escaped or quoted.
        Add support for a generic DNS map.  Based on a patch contributed
                by Leif Johansson of Stockholm University, which was based on
                work by Assar Westerlund of Swedish Institute of Computer
                Science, Kista, and Johan Danielsson of Royal Institute of
                Technology, Stockholm, Sweden.
        MX records will be looked up for FallBackMXhost.  To use the old
                behavior (no MX lookups), put the name in square brackets.
                Proposed by Thom O'Connor.
        Use shared memory to store free space of filesystems that are used
                for queues, if shared memory is available and if a key is set
                via SharedMemoryKey.  This minimizes the number of system
                calls to check the available space.  See doc/op/op.me for
                details.
        If shared memory is compiled in the option -bP can be used to print
                the number of entries in the queue(s).
        Enable generic mail filter API (milter).  See libmilter/README
                and the usual documentation for details.
        Remove AutoRebuildAliases option, deprecated since 8.10.
        Remove '-U' (initial user submission) command line option as
                announced in 8.10.
        Remove support for non-standard SMTP command XUSR.  Use an MSA instead.
        New macro {addr_type} which contains whether the current address is
                an envelope sender or recipient address.  Suggested by
                Neil Rickert of Northern Illinois University.
        Two new options for host maps: -d (retransmission timeout),
                -r (number of retries).
        New option for LDAP maps: the -V<sep> allows you to specify a
                separator such that a lookup can return both an attribute
                and value separated by the given separator.
        Add new operators '%', '|', '&' (modulo, binary or, binary and)
                to map class arith.
        If DoubleBounceAddress expands to an empty string, ``double bounces''
                (errors that occur when sending an error message) are dropped.
        New DontBlameSendmail options GroupReadableSASLDBFile and
                GroupWritableSASLDBFile to relax requirements for sasldb files.
        New DontBlameSendmail options GroupReadableKeyFile to relax
                requirements for files containing secret keys.  This is
                necessary for the MSP if client authentification is used.
        Properly handle quoted filenames for class files (to allow for
                filenames with spaces).
        Honor the resolver option RES_NOALIASES when canonifying hostnames.
        Add macros to avoid the reuse of {if_addr} etc:
                {if_name_out}   hostname of interface of outgoing connection.
                {if_addr_out}   address of interface of outgoing connection.
                {if_family_out} family of interface of outgoing connection.
                The latter two are only set if the interface does not belong
                to the loopback net.
        Add macro {nrcpts} which holds the number of (validated) recipients.
        DialDelay option applies only to mailers with flag 'Z'.  Patch from
                Juergen Georgi of RUS University of Stuttgart.
        New Timeout.lhlo,auth,starttls options to limit the time waiting for
                an answer to the LMTP LHLO, SMTP AUTH or STARTTLS command.
        New Timeout.aconnect option to limit the overall waiting time for
                all connections for a single delivery attempt to succeed.
        Limit the rate recipients in the SMTP envelope are accepted once
                a threshold number of recipients has been rejected (option
                BadRcptThrottle).  From Gregory A Lundberg of the WU-FTPD
                Development Group.
        New option DelayLA to delay connections if the load averages
                exceeds the specified value.  The default of 0 does not
                change the previous behavior.  A value greater than 0
                will cause sendmail to sleep for one second on most
                SMTP commands and before accepting connections if that
                load average is exceeded.
        Use a dynamic (instead of fixed-size) buffer for the list of
                recipients that are sent during a connection to a mailer.
                This also introduces a new mailer field 'r' which defines
                the maximum number of recipients (defaults to 100).
                Based on patch by Motonori Nakamura of Kyoto University.
        Add new F=1 mailer flag to disable sending of null characters ('\0').
        Add new F=2 mailer flag to disable use of ESMTP, using SMTP instead.
        The deprecated [TCP] builtin mailer pathname (P=) is gone.  Use [IPC]
                instead.
        IPC is no longer available as first mailer argument (A=) for [IPC]
                builtin mailer pathnames.  Use TCP instead.
        PH map code updated to use the new libphclient API instead of the
                old libqiapi library.  Contributed by Mark Roth of the
                University of Illinois at Urbana-Champaign.
        New option DirectSubmissionModifiers to define {daemon_flags}
                for direct (command line) submissions.
        New M=O modifier for DaemonPortOptions to ignore the socket in
                case of failures.  Based on patch by Jun-ichiro itojun
                Hagino of the KAME Project.
        Add Disposition-Notification-To: (RFC 2298) to the list of headers
                whose content is rewritten similar to Reply-To:.
                Proposed by Andrzej Filip.
        Use STARTTLS/AUTH=server/client for logging incoming/outgoing
                STARTTLS/AUTH connections; log incoming connections at level
                9 or higher.  Use AUTH/STARTTLS instead of SASL/TLS for SMTP
                AUTH/STARTTLS related logfile entries.
        Convert unprintable characters (and backslash) into octal or C format
                before logging.
        Log recipients if no message is transferred but QUIT/RSET is given
                (at LogLevel 9/10 or higher).
        Log discarded recipients at LogLevel 10 or higher.
        Do not log "did not issue MAIL/EXPN/VRFY/ETRN" for connections
                in which most commands are rejected due to check_relay or
                TCP Wrappers if the host tries one of those commands anyway.
        Change logging format for cloned envelopes to be similar to that for
                DSNs ("old id: new id: clone").  Suggested by Ulrich Windl
                of the Universitat Regensburg.
        Added libsm, a C library of general purpose abstractions including
                assertions, tracing and debugging with named debug categories,
                exception handling, malloc debugging, resource pools,
                portability abstractions, and an extensible buffered I/O
                package.  It will at some point replace libsmutil.
                See libsm/index.html for details.
        Fixed most memory leaks in sendmail which were previously taken
                care of by fork() and exit().
        Use new sm_io*() functions in place of stdio calls.  Allows for
                more consistent portablity amongst different platforms
                new and old (from new libsm).
        Common I/O pkg means just one buffering method needed instead of two
                ('bf_portable' and 'bf_torek' now just 'bf').
        Sfio no longer needed as SASL/TLS code uses sm_io*() API's.
        New possible value 'interactive' for SuperSafe which can be used
                together with DeliveryMode=interactive is to avoid some disk
                synchronizations calls.
        Add per-recipient status information to mailq -v output.
        T_ANY queries are no longer used by sendmail.
        When compiling with "gcc -O -Wall" specify "-DSM_OMIT_BOGUS_WARNINGS"
                too (see include/sm/cdefs.h for more info).
        sendmail -d now has general support for named debug categories.
                See libsm/debug.html and section 3.4 of doc/op/op.me
                for details.
        Eliminate the "postmaster warning" DSNs on address parsing errors
                such as unbalanced angle brackets or parentheses.  The DSNs
                generated by this condition were illegal (not RFC conform).
                Problem noted by Ulrich Windl of the Universitaet Regensburg.
        Do not issue a DSN if the ruleset localaddr resolves to the $#error
                mailer and the recipient has hence been rejected during the
                SMTP dialogue.  Problem reported by Larry Greenfield of CMU.
        Deal with a case of multiple deliveries on misconfigured systems
                that do not have postmaster defined.  If an email was sent
                from an address to which a DSN cannot be returned and
                in which at least one recipient address is non-deliverable,
                then that email had been delivered in each queue run.
                Problem reported by Matteo HCE Valsasna of Universita
                degli Studi dell'Insubria.
        The compilation options SMTP, DAEMON, and QUEUE have been removed,
                i.e., the corresponding code is always compiled in now.
        Log the command line in daemon/queue-run mode at LogLevel 10 and
                higher.  Suggested by Robert Harker of Harker Systems.
        New ResolverOptions setting: WorkAroundBrokenAAAA.  When
                attempting to canonify a hostname, some broken nameservers
                will return SERVFAIL (a temporary failure) on T_AAAA (IPv6)
                lookups.  If you want to excuse this behavior, use this new
                flag.  Suggested by Chris Foote of SE Network Access and
                Mark Roth of the University of Illinois at
                Urbana-Champaign.
        Free the memory allocated by getipnodeby{addr,name}().  Problem
                noted by Joy Latten of IBM.
        ConnectionRateThrottle limits the number of connections per second
                to each daemon individually, not the overall number of
                connections.
        Specifying only "ldap:" as an AliasFile specification will force
                sendmail to use a default alias schema as outlined in the
                ``USING LDAP FOR ALIASES, MAPS, and CLASSES'' section of
                cf/README.
        Add a new syntax for the 'F' (file class) sendmail.cf command.  If
                the first character after the class name is not a '/' or a
                '|' and it contains an '@' (e.g., F{X}key@class:spec), the
                rest of the line will be parsed as a map lookup.  This
                allows classes to be filled via a map lookup.  See op.me
                for more syntax information.  Specifically, this can be
                used for commands such as VIRTUSER_DOMAIN_FILE() to read
                the list of domains via LDAP (see the ``USING LDAP FOR
                ALIASES, MAPS, and CLASSES'' section of cf/README for an
                example).
        The new macro ${sendmailMTACluster} determines the LDAP cluster for
                the default schema used in the above two items.
        Unless DontBlameSendmail=RunProgramInUnsafeDirPath is set, log a
                warning if a program being run from a mailer or file class
                (e.g., F|/path/to/prog) is in an unsafe directory path.
        Unless DontBlameSendmail=RunWritableProgram is set, log a warning
                if a program being run from a mailer or file class
                (e.g., F|/path/to/prog) is group or world writable.
        Loopback interfaces (e.g., "lo0") are now probed for class {w}
                hostnames.  Setting DontProbeInterfaces to "loopback"
                (without quotes) will disable this and return to the
                pre-8.12 behavior of only probing non-loopback interfaces.
                Suggested by Bryan Stansell of GNAC.
        In accordance with RFC 2821 section 4.1.4, accept multiple
                HELO/EHLO commands.
        Multiple ClientPortOptions settings are now allowed, one for each
                possible protocol family which may be used for outgoing
                connections.  Restrictions placed on one family only affect
                outgoing connections on that particular family.  Because of
                this change, the ${client_flags} macro is not set until the
                connection is established.  Based on patch from Motonori
                Nakamura of Kyoto University.
        PrivacyOptions=restrictexpand instructs sendmail to drop privileges
                when the -bv option is given by users who are neither root
                nor the TrustedUser so users can not read private aliases,
                forwards, or :include: files.  It also will override the -v
                (verbose) command line option.
        If the M=b modifier is set in DaemonPortOptions and the interface
                address can't be used for the outgoing connection, fall
                back to the settings in ClientPortOptions (if set).
                Problem noted by John Beck of Sun Microsystems.
        New named config file rule check_data for DATA command (input:
                number of recipients).  Based on patch from Mark Roth of
                the University of Illinois at Urbana-Champaign.
        Add support for ETRN queue selection per RFC 1985.  The queue group
                can be specified using the '#' option character.  For
                example, 'ETRN #queuegroup'.
        If an LDAP server times out or becomes unavailable, close the
                current connection and reopen to get to one of the fallback
                servers.  Patch from Paul Hilchey of the University of
                British Columbia.
        Make default error number on $#error messages 550 instead of 501
                because 501 is not allowed on all commands.
        The .cf file option UnsafeGroupWrites is deprecated, it should be
                replaced with the settings GroupWritableForwardFileSafe
                and GroupWritableIncludeFileSafe in DontBlameSendmail
                if required.
        The deprecated ldapx map class has been removed.  Use the ldap map
                class instead.
        Any IPv6 addresses used in configuration should be prefixed by the
                "IPv6:" tag to identify the address properly.  For example,
                if you want to add the IPv6 address [2002:c0a8:51d2::23f4] to
                class {w}, you would need to add [IPv6:2002:c0a8:51d2::23f4].
        Change the $&{opMode} macro if the operation mode changes while the
                MTA is running.  For example, during a queue run.
        Add "use_inet6" as a new ResolverOptions flag to control the
                RES_USE_INET6 resolver option.  Based on patch from Rick
                Nelson of IBM.
        The maximum number of commands before the MTA slows down when too
                many "light weight" commands have been received are now
                configurable during compile time.  The current values and
                their defaults are:
                    MAXBADCOMMANDS      25      unknown commands
                    MAXNOOPCOMMANDS     20      NOOP, VERB, ONEX, XUSR
                    MAXHELOCOMMANDS     3       HELO, EHLO
                    MAXVRFYCOMMANDS     6       VRFY, EXPN
                    MAXETRNCOMMANDS     8       ETRN
                Setting a value to 0 disables the check.  Patch from Bryan
                Costales of SL3D, Inc.
        The header syntax H?${MyMacro}?X-My-Header: now not only checks if
                ${MyMacro} is defined but also that it is not empty.
        Properly quote usernames with special characters if they are used
                in headers.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        Be sure to include the proper Final-Recipient: DSN header in bounce
                messages for messages for mailing list expanded addresses
                which are not delivered on the initial attempt.
        Do not treat errors as sticky when doing delivery via LMTP after
                the final dot has been sent to avoid affecting future
                deliveries.  Problem reported by Larry Greenfield of CMU.
        New compile time flag REQUIRES_DIR_FSYNC which turns on support for
                file systems that require to call fsync() for a directory
                if the meta-data in it has been changed.  This should be
                set at least for ReiserFS; it is enabled by default for Linux.
                See sendmail/README for further information.
        Avoid file locking deadlock when updating the statistics file if
                sendmail is signaled to terminate.  Problem noted by
                Christophe Wolfhugel of France Telecom.
        Set the $c macro (hop count) as it is being set instead of when the
                envelope is initialized.  Problem noted by Kari Hurtta of
                the Finnish Meteorological Institute.
        Properly count recipients for DeliveryMode defer and queue.  Fix
                from Peter A. Friend of EarthLink.
        Treat invalid hesiod lookups as permanent errors instead of
                temporary errors.  Problem noted by Russell McOrmond of
                flora.ca.
        Portability:
                Remove support for AIX 2, which supports only 14 character
                        filenames and is outdated anyway.  Suggested by
                        Valdis Kletnieks of Virginia Tech.
                Change several settings for Irix 6: remove confSBINDIR,
                        i.e., use default /usr/sbin, change owner/group
                        of man pages and user-executable to root/sys, set
                        optimization limit to 0 (unlimited).  Based on patch
                        from Ayamura Kikuchi, M.D, and proposal from Kari
                        Hurtta of the Finnish Meteorological Institute.
                Do not assume LDAP support is installed by default under
                        Solaris 8 and later.
                Add support for OpenUNIX.
        CONFIG: Increment version number of config file to 10.
        CONFIG: Add an install target and a README file in cf/cf.
        CONFIG: Don't accept addresses of the form a@b@, a@b@c, a@[b]c, etc.
        CONFIG: Reject empty recipient addresses (in check_rcpt).
        CONFIG: The access map uses an option of -T<TMPF> to deal with
                temporary lookup failures.
        CONFIG: New value for access map: SKIP, which causes the default
                action to be taken by aborting the search for domain names
                or IP nets.
        CONFIG: check_rcpt can deal with TEMPFAIL for either recipient or
                relay address as long as the other part allows the email
                to get through.
        CONFIG: Entries for virtusertable can make use of a third parameter
                "%3" which contains "+detail" of a wildcard match, i.e., an
                entry like user+*@domain.  This allows handling of details by
                using %1%3 as the RHS.  Additionally, a "+" wildcard has been
                introduced to match only non-empty details of addresses.
        CONFIG: Numbers for rulesets used by MAILERs have been removed
                and hence there is no required order within the MAILER
                section anymore except for MAILER(`uucp') which must come
                after MAILER(`smtp') if uucp-dom and uucp-uudom are used.
        CONFIG: Hosts listed in the generics domain class {G}
                (GENERICS_DOMAIN() and GENERICS_DOMAIN_FILE()) are treated
                as canonical.  Suggested by Per Hedeland of Ericsson.
        CONFIG: If FEATURE(`delay_checks') is used, make sure that a lookup
                in the access map which returns OK or RELAY actually
                terminates check_* ruleset checking.
        CONFIG: New tag TLS_Rcpt: for access map to be used by ruleset
                tls_rcpt, see cf/README for details.
        CONFIG: Change format of Received: header line which reveals whether
                STARTTLS has been used to "(version=${tls_version}
                cipher=${cipher} bits=${cipher_bits} verify=${verify})".
        CONFIG: Use "Spam:" as tag for lookups for FEATURE(`delay_checks')
                options friends/haters instead of "To:" and enable
                specification of whole domains instead of just users.
                Notice: this change is not backward compatible.
                Suggested by Chris Adams from HiWAAY Informations Services.
        CONFIG: Allow for local extensions for most new rulesets, see
                cf/README for details.
        CONFIG: New FEATURE(`lookupdotdomain') to lookup also .domain in
                the access map.  Proposed by Randall Winchester of the
                University of Maryland.
        CONFIG: New FEATURE(`local_no_masquerade') to avoid masquerading for
                the local mailer.  Proposed by Ingo Brueckl of Wupper Online.
        CONFIG: confRELAY_MSG/confREJECT_MSG can override the default
                messages for an unauthorized relaying attempt/for access
                map entries with RHS REJECT, respectively.
        CONFIG: FEATURE(`always_add_domain') takes an optional argument
                to specify another domain to be added instead of the local one.
                Suggested by Richard H. Gumpertz of Computer Problem
                Solving.
        CONFIG: confAUTH_OPTIONS allows setting of Cyrus-SASL specific
                options, see doc/op/op.me for details.
        CONFIG: confAUTH_MAX_BITS sets the maximum encryption strength for
                the security layer in SMTP AUTH (SASL).
        CONFIG: If Local_localaddr resolves to $#ok, localaddr is terminated
                immediately.
        CONFIG: FEATURE(`enhdnsbl') is an enhanced version of dnsbl which
                allows checking of the return values of the DNS lookups.
                See cf/README for details.
        CONFIG: FEATURE(`dnsbl') allows now to specify the behavior for
                temporary lookup failures.
        CONFIG: New option confDELIVER_BY_MIN to specify minimum time for
                Deliver By (RFC 2852) or to turn off the extension.
        CONFIG: New option confSHARED_MEMORY_KEY to set the key for shared
                memory use.
        CONFIG: New FEATURE(`compat_check') to look up a key consisting
                of the sender and the recipient address delimited by the
                string "<@>", e.g., sender@sdomain<@>recipient@rdomain,
                in the access map.  Based on code contributed by Mathias
                Koerber of Singapore Telecommunications Ltd.
        CONFIG: Add EXPOSED_USER_FILE() command to allow an exposed user
                file.  Suggested by John Beck of Sun Microsystems.
        CONFIG: Don't use MAILER-DAEMON for error messages delivered
                via LMTP.  Problem reported by Larry Greenfield of CMU.
        CONFIG: New FEATURE(`preserve_luser_host') to preserve the name of
                the recipient host if LUSER_RELAY is used.
        CONFIG: New FEATURE(`preserve_local_plus_detail') to preserve the
                +detail portion of the address when passing address to
                local delivery agent.  Disables alias and .forward +detail
                stripping.  Only use if LDA supports this.
        CONFIG: Removed deprecated FEATURE(`rbl').
        CONFIG: Add LDAPROUTE_EQUIVALENT() and LDAPROUTE_EQUIVALENT_FILE()
                which allow you to specify 'equivalent' hosts for LDAP
                Routing lookups.  Equivalent hostnames are replaced by the
                masquerade domain name for lookups.  See cf/README for
                additional details.
        CONFIG: Add a fourth argument to FEATURE(`ldap_routing') which
                instructs the rulesets on what to do if the address being
                looked up has +detail information.  See cf/README for more
                information.
        CONFIG: When chosing a new destination via LDAP Routing, also look
                up the new routing address/host in the mailertable.  Based
                on patch from Don Badrak of the United States Census Bureau.
        CONFIG: Do not reject the SMTP Mail from: command if LDAP Routing
                is in use and the bounce option is enabled.  Only reject
                recipients as user unknown.
        CONFIG: Provide LDAP support for the remaining database map
                features.  See the ``USING LDAP FOR ALIASES AND MAPS''
                section of cf/README for more information.
        CONFIG: Add confLDAP_CLUSTER which defines the ${sendmailMTACluster}
                macro used for LDAP searches as described above in ``USING
                LDAP FOR ALIASES, MAPS, AND CLASSES''.
        CONFIG: confCLIENT_OPTIONS has been replaced by CLIENT_OPTIONS(),
                which takes the options as argument and can be used
                multiple times; see cf/README for details.
        CONFIG: Add configuration macros for new options:
                confBAD_RCPT_THROTTLE           BadRcptThrottle
                confDIRECT_SUBMISSION_MODIFIERS DirectSubmissionModifiers
                confMAILBOX_DATABASE            MailboxDatabase
                confMAX_QUEUE_CHILDREN          MaxQueueChildren
                confMAX_RUNNERS_PER_QUEUE       MaxRunnersPerQueue
                confNICE_QUEUE_RUN              NiceQueueRun
                confQUEUE_FILE_MODE             QueueFileMode
                confFAST_SPLIT                  FastSplit
                confTLS_SRV_OPTIONS             TLSSrvOptions
                See above (and related documentation) for further information.
        CONFIG: Add configuration variables for new timeout options:
                confTO_ACONNECT         Timeout.aconnect
                confTO_AUTH             Timeout.auth
                confTO_LHLO             Timeout.lhlo
                confTO_STARTTLS         Timeout.starttls
        CONFIG: Add configuration macros for mail filter API:
                confINPUT_MAIL_FILTERS          InputMailFilters
                confMILTER_LOG_LEVEL            Milter.LogLevel
                confMILTER_MACROS_CONNECT       Milter.macros.connect
                confMILTER_MACROS_HELO          Milter.macros.helo
                confMILTER_MACROS_ENVFROM       Milter.macros.envfrom
                confMILTER_MACROS_ENVRCPT       Milter.macros.envrcpt
                Mail filters can be defined via INPUT_MAIL_FILTER() and
                MAIL_FILTER().  See libmilter/README, cf/README, and
                doc/op/op.me for details.
        CONFIG: Add support for accepting temporarily unresolvable domains.
                See cf/README for details.  Based on patch by Motonori
                Nakamura of Kyoto University.
        CONFIG: confDEQUOTE_OPTS can be used to specify options for the
                dequote map.
        CONFIG: New macro QUEUE_GROUP() to define queue groups.
        CONFIG: New FEATURE(`queuegroup') to select a queue group based
                on the full e-mail address or the domain of the recipient.
        CONFIG: Any IPv6 addresses used in configuration should be prefixed
                by the "IPv6:" tag to identify the address properly.  For
                example, if you want to use the IPv6 address
                2002:c0a8:51d2::23f4 in the access database, you would need
                to use IPv6:2002:c0a8:51d2::23f4 on the left hand side.
                This affects the access database as well as the
                relay-domains and local-host-names files.
        CONFIG: OSTYPE(aux) has been renamed to OSTYPE(a-ux).
        CONFIG: Avoid expansion of m4 keywords in SMART_HOST.
        CONFIG: Add MASQUERADE_EXCEPTION_FILE() for reading masquerading
                exceptions from a file.  Suggested by Trey Breckenridge of
                Mississippi State University.
        CONFIG: Add LOCAL_USER_FILE() for reading local users
                (LOCAL_USER() -- $={L}) entries from a file.
        CONTRIB: dnsblaccess.m4 is a further enhanced version of enhdnsbl.m4
                which allows to lookup error codes in the access map.
                Contributed by Neil Rickert of Northern Illinois University.
        DEVTOOLS: Add new options for installation of include and library
                files: confINCGRP, confINCMODE, confINCOWN, confLIBGRP,
                confLIBMODE, confLIBOWN.
        DEVTOOLS: Add new option confDONT_INSTALL_CATMAN to turn off
                installation of the the formatted man pages on operating
                systems which don't include cat directories.
        EDITMAP: New program for editing maps as supplement to makemap.
        MAIL.LOCAL: Mail.local now uses the libsm mbdb package to look up
                local mail recipients.  New option -D mbdb specifies the
                mailbox database type.
        MAIL.LOCAL: New option "-h filename" which instructs mail.local to
                deliver the mail to the named file in the user's home
                directory instead of the system mail spool area.  Based on
                patch from Doug Hardie of the Los Angeles Free-Net.
        MAILSTATS: New command line option -P which acts the same as -p but
                doesn't truncate the statistics file.
        MAKEMAP: Add new option -t to specify a different delimiter
                instead of white space.
        RMAIL: Invoke sendmail with '-G' to indicate this is a gateway
                submission.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        SMRSH: Use the vendor supplied directory on FreeBSD 3.3 and later.
        VACATION: Change Auto-Submitted: header value from auto-generated to
                auto-replied.  From Kenneth Murchison of Oceana Matrix Ltd.
        VACATION: New option -d to send error/debug messages to stdout
                instead of syslog.
        VACATION: New option -U which prevents the attempt to lookup login
                in the password file.  The -f and -m options must be used
                to specify the database and message file since there is no
                home directory for the default settings for these options.
        VACATION: Vacation now uses the libsm mbdb package to look up
                local mail recipients; it reads the MailboxDatabase option
                from the sendmail.cf file.  New option -C cffile which
                specifies the path of the sendmail.cf file.
        New Directories:
                libmilter/docs
        New Files:
                cf/cf/README
                cf/cf/submit.cf
                cf/cf/submit.mc
                cf/feature/authinfo.m4
                cf/feature/compat_check.m4
                cf/feature/enhdnsbl.m4
                cf/feature/msp.m4
                cf/feature/local_no_masquerade.m4
                cf/feature/lookupdotdomain.m4
                cf/feature/preserve_luser_host.m4
                cf/feature/preserve_local_plus_detail.m4
                cf/feature/queuegroup.m4
                cf/sendmail.schema
                contrib/dnsblaccess.m4
                devtools/M4/UNIX/sm-test.m4
                devtools/OS/OpenUNIX.5.i386
                editmap/*
                include/sm/*
                libsm/*
                libsmutil/cf.c
                libsmutil/err.c
                sendmail/SECURITY
                sendmail/TUNING
                sendmail/bf.c
                sendmail/bf.h
                sendmail/sasl.c
                sendmail/sm_resolve.c
                sendmail/sm_resolve.h
                sendmail/tls.c
        Deleted Files:
                cf/feature/rbl.m4
                cf/ostype/aix2.m4
                devtools/OS/AIX.2
                include/sendmail/cdefs.h
                include/sendmail/errstring.h
                include/sendmail/useful.h
                libsmutil/errstring.c
                sendmail/bf_portable.c
                sendmail/bf_portable.h
                sendmail/bf_torek.c
                sendmail/bf_torek.h
                sendmail/clock.c
        Renamed Files:
                cf/cf/generic-solaris2.mc => cf/cf/generic-solaris.mc
                cf/cf/generic-solaris2.cf => cf/cf/generic-solaris.cf
                cf/ostype/aux.m4 => cf/ostype/a-ux.m4

8.11.6/8.11.6   2001/08/20
        SECURITY: Fix a possible memory access violation when specifying
                out-of-bounds debug parameters.  Problem detected by
                Cade Cairns of SecurityFocus.
        Avoid leaking recipient information in unrelated DSNs.  This could
                happen if a connection is aborted, several mails had been
                scheduled for delivery via that connection, and the timeout
                is reached such that several DSNs are sent next.  Problem
                noted by Dileepan Moorkanat of Hewlett-Packard.
        Fix a possible segmentation violation when specifying too many
                wildcard operators in a rule.  Problem detected by
                Werner Wiethege.
        Avoid a segmentation fault on non-matching Hesiod lookups.  Problem
                noted by Russell McOrmond of flora.ca

8.11.5/8.11.5   2001/07/31
        Fix a possible race condition when sending a HUP signal to restart
                the daemon.  This could terminate the current process without
                starting a new daemon.  Problem reported by Wolfgang Breyha
                of SE Netway Communications.
        Only apply MaxHeadersLength when receiving a message via SMTP or
                the command line.  Problem noted by Andrey J. Melnikoff.
        When finding the system's local hostname on an IPv6-enabled system
                which doesn't have any IPv6 interface addresses, fall back
                to looking up only IPv4 addresses.  Problem noted by Tim
                Bosserman of EarthLink.
        When commands were being rejected due to check_relay or TCP
                Wrappers, the ETRN command was not giving a response.
        Incoming IPv4 connections on a Family=inet6 daemon (using
                IPv4-mapped addresses) were incorrectly labeled as "may be
                forged".  Problem noted by Per Steinar Iversen of Oslo
                University College.
        Shutdown address test mode cleanly on SIGTERM.  Problem noted by
                Greg King of the OAO Corporation.
        Restore the original real uid (changed in main() to prevent
                out of band signals) before invoking a delivery agent.
                Some delivery agents use this for the "From " envelope
                "header".  Problem noted by Leslie Carroll of the
                University at Albany.
        Mark closed file descriptors properly to avoid reuse. Problem
                noted by Jeff Bronson of J.D. Bronson, Inc.
        Setting Timeout options on the command line will also override
                their sub-suboptions in the .cf file, e.g., -O
                Timeout.queuereturn=2d will set all queuereturn timeouts
                to 2 days.  Problem noted by Roger B.A. Klorese.
        Portability:
                BSD/OS has a broken setreuid() implementation.  Problem
                        noted by Vernon Schryver of Rhyolite Software.
                BSD/OS has /dev/urandom(4) (as of version 4.1/199910 ?).
                        Noted by Vernon Schryver of Rhyolite Software.
                BSD/OS has fchown(2).  Noted by Dave Yadallee of Netline
                        2000 Internet Solutions Inc.
                Solaris 2.X and later have strerror(3).  From Sebastian
                        Hagedorn of Cologne University.
        CONFIG: Fix parsing for IPv6 domain literals in addresses
                (user@[IPv6:address]).  Problem noted by Liyuan Zhou.

8.11.4/8.11.4   2001/05/28
        Clean up signal handling routines to reduce the chances of heap
                corruption and other potential race conditions.
                Terminating and restarting the daemon may not be
                instantaneous due to this change.  Also, non-root users can
                no longer send out-of-band signals.  Problem reported by
                Michal Zalewski of BindView.
        If LogLevel is greater than 9 and SASL fails to negotiate an
                encryption layer, avoid core dump logging the encryption
                strength.  Problem noted by Miroslav Zubcic of Crol.
        If a server offers "AUTH=" and "AUTH " and the list of mechanisms is
                different in those two lines, sendmail might not have
                recognized (and used) all of the offered mechanisms.
        Fix an IP address lookup problem on Solaris 2.0 - 2.3.  Patch
                from Kenji Miyake.
        This time, really don't use the .. directory when expanding
                QueueDirectory wildcards.
        If a process is interrupted while closing a map, don't try to close
                the same map again while exiting.
        Allow local mailers (F=l) to contact remote hosts (e.g., via
                LMTP).  Problem noted by Norbert Klasen of the University
                of Tuebingen.
        If Timeout.QueueReturn was set to a value less the time it took
                to write a new queue file (e.g., 0 seconds), the bounce
                message would be lost.  Problem noted by Lorraine L Goff of
                Oklahoma State University.
        Pass map argument vector into map rewriting engine for the regex
                and prog map types.  Problem noted by Stephen Gildea of
                InTouch Systems, Inc.
        When closing an LDAP map due to a temporary error, close all of the
                other LDAP maps which share the original map's connection
                to the LDAP server.  Patch from Victor Duchovni of
                Morgan Stanley.
        To detect changes of NDBM aliases files check the timestamp of the
                .pag file instead of the .dir file.  Problem noted by Neil
                Rickert of Northern Illinois University.
        Don't treat temporary hesiod lookup failures as permanent.  Patch
                from Werner Wiethege.
        If ClientPortOptions is set, make sure to create the outgoing socket
                with the family set in that option.  Patch from Sean Farley.
        Avoid a segmentation fault trying to dereference a NULL pointer
                when logging a MaxHopCount exceeded error with an empty
                recipient list.  Problem noted by Chris Adams of HiWAAY
                Internet Services.
        Fix DSN for "Too many hops" bounces.  Problem noticed by Ulrich
                Windl of the Universitaet Regensburg.
        Fix DSN for "mail loops back to me" bounces.  Problem noticed by
                Kari Hurtta of the Finnish Meteorological Institute.
        Portability:
                OpenBSD has a broken setreuid() implementation.
        CONFIG: Undo change from 8.11.1: change 501 SMTP reply code back
                to 553 since it is allowed by DRUMS.
        CONFIG: Add OSTYPE(freebsd4) for FreeBSD 4.X.
        DEVTOOLS: install.sh did not properly handle paths in the source
                file name argument.  Noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        DEVTOOLS: Add FAST_PID_RECYCLE to compile time options for OpenBSD
                since it generates random process ids.
        PRALIASES: Add back adaptive algorithm to deal with different endings
                of entries in the database (with/without trailing '\0').
                Patch from John Beck of Sun Microsystems.
        New Files:
                cf/ostype/freebsd4.m4

8.11.3/8.11.3   2001/02/27
        Prevent a segmentation fault when a bogus value was used in the
                LDAPDefaultSpec option's -r, -s, or -M flags and if a bogus
                option was used.  Problem noted by Allan E Johannesen of
                Worcester Polytechnic Institute.
        Prevent "token too long" message by shortening {currHeader} which
                could be too long if the last copied character was a quote.
                Problem detected by Jan Krueger of digitalanswers
                communications consulting gmbh.
        Additional IPv6 check for unspecified addresses.  Patch from
                Jun-ichiro itojun Hagino of the KAME Project.
        Do not ignore the ClientPortOptions setting if DaemonPortOptions
                Modifier=b (bind to same interface) is set and the
                connection came in from the command line.
        Do not bind to the loopback address if DaemonPortOptions
                Modifier=b (bind to same interface) is set.  Patch from
                John Beck of Sun Microsystems.
        Properly deal with open failures on non-optional maps used in
                check_* rulesets by returning a temporary failure.
        Buffered file I/O files were not being properly fsync'ed to disk
                when they were committed.
        Properly encode '=' for the AUTH= parameter of the MAIL command.
                Problem noted by Hadmut Danisch.
        Under certain circumstances the macro {server_name} could be set
                to the wrong hostname (of a previous connection), which may
                cause some rulesets to return wrong results.  This would
                usually cause mail to be queued up and delivered later on.
        Ignore F=z (LMTP) mailer flag if $u is given in the mailer A=
                equate.  Problem noted by Motonori Nakamura of Kyoto
                University.
        Work around broken accept() implementations which only partially
                fill in the peer address if the socket is closed before
                accept() completes.
        Return an SMTP "421" temporary failure if the data file can't be
                opened where the "354" reply would normally be given.
        Prevent a CPU loop in trying to expand a macro which doesn't exist
                in a queue run.  Problem noted by Gordon Lack of Glaxo
                Wellcome.
        If delivering via a program and that program exits with EX_TEMPFAIL,
                note that fact for the mailq display instead of just showing
                "Deferred".  Problem noted by Motonori Nakamura of Kyoto
                University.
        If doing canonification via /etc/hosts, try both the fully
                qualified hostname as well as the first portion of the
                hostname.  Problem noted by David Bremner of the
                University of New Brunswick.
        Portability:
                Fix a compilation problem for mail.local and rmail if SFIO
                        is in use.  Problem noted by Auteria Wally
                        Winzer Jr. of Champion Nutrition.
                IPv6 changes for platforms using KAME.  Patch from
                        Jun-ichiro itojun Hagino of the KAME Project.
                OpenBSD 2.7 and higher has srandomdev(3).  OpenBSD 2.8 and
                        higher has BSDI-style login classes.  Patch from
                        Todd C.  Miller of Courtesan Consulting.
                Unixware 7.1.1 doesn't allow h_errno to be set directly if
                        sendmail is being compiled with -kthread.  Problem
                        noted by Orion Poplawski of CQG, Inc.
        CONTRIB: buildvirtuser: Substitute current domain for $DOMAIN and
                current left hand side for $LHS in virtuser files.
        DEVTOOLS: Do not pass make targets to recursive Build invocations.
                Problem noted by Jeff Bronson of J.D. Bronson, Inc.
        MAIL.LOCAL: In LMTP mode, do not return errors regarding problems
                storing the temporary message file until after the remote
                side has sent the final DATA termination dot.  Problem
                noted by Allan E Johannesen of Worcester Polytechnic
                Institute.
        MAIL.LOCAL: If LMTP mode is set, give a temporary error if users
                are also specified on the command line.  Patch from
                Motonori Nakamura of Kyoto University.
        PRALIASES: Skip over AliasFile specifications which aren't based on
                database files (i.e., only show dbm, hash, and btree).
        Renamed Files:
                devtools/OS/OSF1.V5.0 => devtools/OS/OSF1.V5.x

8.11.2/8.11.2   2000/12/29
        Prevent a segmentation fault when trying to set a class in
                address test mode due to a negative array index.  Audit
                other array indexing.  This bug is not believed to be
                exploitable.  Noted by Michal Zalewski of the "Internet for
                Schools" project (IdS).
        Add an FFR (for future release) to drop privileges when using
                address test mode.  This will be turned on in 8.12. It can
                be enabled by compiling with:
                APPENDDEF(`conf_sendmail_ENVDEF', `-D_FFR_TESTMODE_DROP_PRIVS')
                in your devtools/Site/site.config.m4 file.  Suggested by
                Michal Zalewski of the "Internet for Schools" project (IdS).
        Fix potential problem with Cyrus-SASL security layer which may have
                caused I/O errors, especially for mechanism DIGEST-MD5.
        When QueueSortOrder was set to host, sendmail might not read
                enough of the queue file to determine the host, making the
                sort sub-optimal.  Problem noted by Jeff Earickson of
                Colby College.
        Don't issue DSNs for addresses which use the NOTIFY parameter (per
                RFC 1891) but don't have FAILURE as value.
        Initialize Cyrus-SASL library before the SMTP daemon is started.
                This implies that every change to SASL related files requires
                a restart of the daemon, e.g., Sendmail.conf, new SASL
                mechanisms (in form of shared libraries).
        Properly set the STARTTLS related macros during a queue run for
                a cached connection.  Bug reported by Michael Kellen of
                NxNetworks, Inc.
        Log the server name in relay= for ruleset tls_server instead of the
                client name.
        Include original length of bad field/header when reporting
                MaxMimeHeaderLength problems.  Requested by Ulrich Windl of
                the Universitat Regensburg.
        Fix delivery to set-user-ID files that are expanded from aliases in
                DeliveryMode queue.  Problem noted by Ric Anderson of the
                University of Arizona.
        Fix LDAP map -m (match only) flag.  Problem noted by Jeff Giuliano
                of Collective Technologies.
        Avoid using a negative argument for sleep() calls when delaying answers
                to EXPN/VRFY commands on systems which respond very slowly.
                Problem noted by Mikolaj J. Habryn of Optus Internet
                Engineering.
        Make sure the F=u flag is set in the default prog mailer
                definition.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        Fix IPv6 check for unspecified addresses.  Patch from
                Jun-ichiro itojun Hagino of the KAME Project.
        Fix return values for IRIX nsd map.  From Kari Hurtta of the Finnish
                Meteorological Institute.
        Fix parsing of DaemonPortOptions and ClientPortOptions.  Read all
                of the parameters to find Family= setting before trying to
                interpret Addr= and Port=.  Problem noted by Valdis
                Kletnieks of Virginia Tech.
        When delivering to a file directly from an alias, do not call
                initgroups(); instead use the DefaultUser group information.
                Problem noted by Marc Schaefer of ALPHANET NF.
        RunAsUser now overrides the ownership of the control socket, if
                created.  Otherwise, sendmail can not remove it upon
                close.  Problem noted by Werner Wiethege.
        Fix ConnectionRateThrottle counting as the option is the number of
                overall connections, not the number of connections per
                socket.  A future version may change this to per socket
                counting.
        Portability:
                Clean up libsmdb so it functions properly on platforms
                        where sizeof(u_int32_t) != sizeof(size_t).  Problem
                        noted by Rein Tollevik of Basefarm AS.
                Fix man page formatting for compatibility with Solaris'
                        whatis.  From Stephen Gildea of InTouch Systems, Inc.
                UnixWare 7 includes snprintf() support.  From Larry
                        Rosenman.
                IPv6 changes for platforms using KAME.  Patch from
                        Jun-ichiro itojun Hagino of the KAME Project.
                Avoid a typedef compile conflict with Berkeley DB 3.X and
                        Solaris 2.5 or earlier.  Problem noted by Bob Hughes
                        of Pacific Access.
                Add preliminary support for AIX 5.  Contributed by
                        Valdis Kletnieks of Virginia Tech.
                Solaris 9 load average support from Andrew Tucker of Sun
                        Microsystems.
        CONFIG: Reject addresses of the form a!b if FEATURE(`nouucp', `r')
                is used.  Problem noted by Phil Homewood of Asia Online,
                patch from Neil Rickert of Northern Illinois University.
        CONFIG: Change the default DNS based blacklist server for
                FEATURE(`dnsbl') to blackholes.mail-abuse.org.
        CONFIG: Deal correctly with the 'C' flag in {daemon_flags}, i.e.,
                implicitly assume canonical host names.
        CONFIG: Deal with "::" in IPv6 addresses for access_db.  Based on
                patch by Motonori Nakamura of Kyoto University.
        CONFIG: New OSTYPE(`aix5') contributed by Valdis Kletnieks of
                Virginia Tech.
        CONFIG: Pass the illegal header form <list:;> through untouched
                instead of making it worse.  Problem noted by Motonori
                Nakamura of Kyoto University.
        CONTRIB: Added buildvirtuser (see `perldoc contrib/buildvirtuser`).
        CONTRIB: qtool.pl: An empty queue is not an error.  Problem noted
                by Jan Krueger of digitalanswers communications consulting
                gmbh.
        CONTRIB: domainmap.m4: Handle domains with '-' in them.  From Mark
                Roth of the University of Illinois at Urbana-Champaign.
        DEVTOOLS: Change the internal devtools OS, REL, and ARCH m4
                variables into bldOS, bldREL, and bldARCH to prevent
                namespace collisions.  Problem noted by Motonori Nakamura
                of Kyoto University.
        RMAIL: Undo the 8.11.1 change to use -G when calling sendmail.  It
                causes some changes in behavior and may break rmail for
                installations where sendmail is actually a wrapper to
                another MTA.  The change will re-appear in a future
                version.
        SMRSH: Use the vendor supplied directory on HPUX 10.X, HPUX 11.X,
                and SunOS 5.8.  Requested by Jeff A. Earickson of Colby
                College and John Beck of Sun Microsystems.
        VACATION: Fix pattern matching for addresses to ignore.
        VACATION: Don't reply to addresses of the form owner-*
                or *-owner.
        New Files:
                cf/ostype/aix5.m4
                contrib/buildvirtuser
                devtools/OS/AIX.5.0

8.11.1/8.11.1   2000/09/27
        Fix SMTP EXPN command output if the address expands to a single
                name.  Fix from John Beck of Sun Microsystems.
        Don't try STARTTLS in the client if the PRNG has not been properly
                seeded.  This problem only occurs on systems without
                /dev/urandom.  Problem detected by Jan Krueger of
                digitalanswers communications consulting gmbh and
                Neil Rickert of Northern Illinois University.
        Don't use the . and .. directories when expanding QueueDirectory
                wildcards.
        Do not try to cache LDAP connections across processes as a parent
                process may close the connection before the child process
                has completed.  Problem noted by Lai Yiu Fai of the Hong
                Kong University of Science and Technology and Wolfgang
                Hottgenroth of UUNET.
        Use Timeout.fileopen to limit the amount of time spent trying to
                read the LDAP secret from a file.
        Prevent SIGTERM from removing a command line submitted item after
                the user submits the message and before the first delivery
                attempt completes.  Problem noted by Max France of AlphaNet.
                Fix from Neil Rickert of Northern Illinois University.
        Deal correctly with MaxMessageSize restriction if message size is
                greater than 2^31.  Problem noted by Tim "Darth Dice" Bosserman
                of EarthLink.
        Turn off queue checkpointing if CheckpointInterval is set to zero.
        Treat an empty home directory (from getpw*() or $HOME) as
                non-existent instead of treating it as /.  Problem noted by
                Todd C. Miller of Courtesan Consulting.
        Don't drop duplicate headers when reading a queued item.  Problem
                noted by Motonori Nakamura of Kyoto University.
        Avoid bogus error text when logging the savemail panic "cannot
                save rejected email anywhere".  Problem noted by Marc G.
                Fournier of Acadia University.
        If an LDAP search fails because the LDAP server went down, close
                the map so subsequent searches reopen the map.  If there are
                multiple LDAP servers, the down server will be skipped and
                one of the others may be able to take over.
        Set the ${load_avg} macro to the current load average, not the
                previous load average query result.
        If a non-optional map used in a check_* ruleset can't be opened,
                return a temporary failure to the remote SMTP client
                instead of ignoring the map.  Problem noted by Allan E
                Johannesen of Worcester Polytechnic Institute.
        Avoid a race condition when queuing up split envelopes by saving
                the split envelopes before the original envelope.
        Fix a bug in the PH_MAP code which caused mail to bounce instead of
                defer if the PH server could not be contacted.  From Mark
                Roth of the University of Illinois at Urbana-Champaign.
        Prevent QueueSortOrder=Filename from interfering with -qR, -qS, and
                ETRN.  Problem noted by Erik R. Leo of SoVerNet.
        Change error code for unrecognized parameters to the SMTP MAIL and
                RCPT commands from 501 to 555 per RFC 1869.  Problem
                reported to Postfix by Robert Norris of Monash University.
        Prevent overwriting the argument of -B on certain OS.  Problem
                noted by Matteo Gelosa of I.NET S.p.A.
        Use the proper routine for freeing memory with Netscape's LDAP
                client libraries.  Patch from Paul Hilchey of the
                University of British Columbia.
        Portability:
                Move the NETINET6 define to devtools/OS/SunOS.5.{8,9}
                        instead of defining it in conf.h so users can
                        override the setting.  Suggested by
                        Henrik Nordstrom of Ericsson.
                On HP-UX 10.X and 11.X, use /usr/sbin/sendmail instead of
                        /usr/lib/sendmail for rmail and vacation.  From
                        Jeff A. Earickson of Colby College.
                On HP-UX 11.X, use /usr/sbin instead of /usr/libexec (which
                        does not exist).  From Jeff A. Earickson of Colby
                        College.
                Avoid using the UCB subsystem on NCR MP-RAS 3.x.  From
                        Tom Moore of NCR.
                NeXT 3.X and 4.X installs man pages in /usr/man.  From
                        Hisanori Gogota of NTT/InterCommunicationCenter.
                Solaris 8 and later include /var/run.  The default PID file
                        location is now /var/run/sendmail.pid.  From John
                        Beck of Sun Microsystems.
                SFIO includes snprintf() for those operating systems
                        which do not.  From Todd C. Miller of Courtesan
                        Consulting.
        CONFIG: Use the result of _CERT_REGEX_SUBJECT_ not {cert_subject}.
                Problem noted by Kaspar Brand of futureLab AG.
        CONFIG: Change 553 SMTP reply code to 501 to avoid problems with
                errors in the MAIL address.
        CONFIG: Fix FEATURE(nouucp) usage in example .mc files.  Problem
                noted by Ron Jarrell of Virginia Tech.
        CONFIG: Add support for Solaris 8 (and later) as OSTYPE(solaris8).
                Contributed by John Beck of Sun Microsystems.
        CONFIG: Set confFROM_HEADER such that the mail hub can possibly add
                GECOS information for an address.  This more closely
                matches pre-8.10 nullclient behavior.  From Per Hedeland of
                Ericsson.
        CONFIG: Fix MODIFY_MAILER_FLAGS(): apply the flag modifications for
                SMTP to all *smtp* mailers and those for RELAY to the relay
                mailer as described in cf/README.
        MAIL.LOCAL: Open the mailbox as the recipient not root so quotas
                are obeyed.  Problem noted by Damian Kuczynski of NIK.
        MAKEMAP: Do not change a map's owner to the TrustedUser if using
                makemap to 'unmake' the map.
        RMAIL: Avoid overflowing the list of recipients being passed to
                sendmail.
        RMAIL: Invoke sendmail with '-G' to indicate this is a gateway
                submission.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        VACATION: Read the complete message to avoid "broken pipe" signals.
        VACATION: Do not cut off vacation.msg files which have a single
                dot as the only character on the line.
        New Files:
                cf/ostype/solaris8.m4

8.11.0/8.11.0   2000/07/19
        SECURITY: If sendmail is installed as a non-root set-user-ID binary
                (not the normal case), some operating systems will still
                keep a saved-uid of the effective-uid when sendmail tries
                to drop all of its privileges.  If sendmail needs to drop
                these privileges and the operating system doesn't set the
                saved-uid as well, exit with an error.  Problem noted by
                Kari Hurtta of the Finnish Meteorological Institute.
        SECURITY: sendmail depends on snprintf() NUL terminating the string
                it populates.  It is possible that some broken
                implementations of snprintf() exist that do not do this.
                Systems in this category should compile with
                -DSNPRINTF_IS_BROKEN=1.  Use test/t_snprintf.c to test your
                system and report broken implementations to
                sendmail-bugs@sendmail.org and your OS vendor.  Problem
                noted by Slawomir Piotrowski of TELSAT GP.
        Support SMTP Service Extension for Secure SMTP (RFC 2487) (STARTTLS).
                Implementation influenced by the example programs of
                OpenSSL and the work of Lutz Jaenicke of TU Cottbus.
        Add new STARTTLS related options CACERTPath, CACERTFile,
                ClientCertFile, ClientKeyFile, DHParameters, RandFile,
                ServerCertFile, and ServerKeyFile.  These are documented in
                cf/README and doc/op/op.*.
        New STARTTLS related macros: ${cert_issuer}, ${cert_subject},
                ${tls_version}, ${cipher}, ${cipher_bits}, ${verify},
                ${server_name}, and ${server_addr}.  These are documented
                in cf/README and doc/op/op.*.
        Add support for the Entropy Gathering Daemon (EGD) for better
                random data.
        New DontBlameSendmail option InsufficientEntropy for systems which
                don't properly seed the PRNG for OpenSSL but want to
                try to use STARTTLS despite the security problems.
        Support the security layer in SMTP AUTH for mechanisms which
                support encryption.  Based on code contributed by Tim
                Martin of CMU.
        Add new macro ${auth_ssf} to reflect the SMTP AUTH security
                strength factor.
        LDAP's -1 (single match only) flag was not honored if the -z
                (delimiter) flag was not given.  Problem noted by ST Wong of
                the Chinese University of Hong Kong.  Fix from Mark Adamson
                of CMU.
        Add more protection from accidentally tripping OpenLDAP 1.X's
                ld_errno == LDAP_DECODING_ERROR hack on ldap_next_attribute().
                Suggested by Kurt Zeilenga of OpenLDAP.
        Fix the default family selection for DaemonPortOptions.  As
                documented, unless a family is specified in a
                DaemonPortOptions option, "inet" is the default.  It is
                also the default if no DaemonPortOptions value is set.
                Therefore, IPv6 users should configure additional sockets
                by adding DaemonPortOptions settings with Family=inet6 if
                they wish to also listen on IPv6 interfaces.  Problem noted
                by Jun-ichiro itojun Hagino of the KAME Project.
        Set ${if_family} when setting ${if_addr} and ${if_name} to reflect
                the interface information for an outgoing connection.
                Not doing so was creating a mismatch between the socket
                family and address used in subsequent connections if the
                M=b modifier was set in DaemonPortOptions.  Problem noted
                by John Beck of Sun Microsystems.
        If DaemonPortOptions modifier M=b is used, determine the socket
                family based on the IP address.  ${if_family} is no longer
                persistent (i.e., saved in qf files).  Patch from John Beck
                of Sun Microsystems.
        sendmail 8.10 and 8.11 reused the ${if_addr} and ${if_family}
                macros for both the incoming interface address/family and
                the outgoing interface address/family.  In order for M=b
                modifier in DaemonPortOptions to work properly, preserve
                the incoming information in the queue file for later
                delivery attempts.
        Use SMTP error code and enhanced status code from check_relay in
                responses to commands.  Problem noted by Jeff Wasilko of
                smoe.org.
        Add more vigilance in checking for putc() errors on output streams
                to protect from a bug in Solaris 2.6's putc().  Problem
                noted by Graeme Hewson of Oracle.
        The LDAP map -n option (return attribute names only) wasn't working.
                Problem noted by Ajay Matia.
        Under certain circumstances, an address could be listed as deferred
                but would be bounced back to the sender as failed to be
                delivered when it really should have been queued.  Problem
                noted by Allan E Johannesen of Worcester Polytechnic Institute.
        Prevent a segmentation fault in a child SMTP process from getting
                the SMTP transaction out of sync.  Problem noted by Per
                Hedeland of Ericsson.
        Turn off RES_DEBUG if SFIO is defined unless SFIO_STDIO_COMPAT
                is defined to avoid a core dump due to incompatibilities
                between sfio and stdio.  Problem noted by Neil Rickert
                of Northern Illinois University.
        Don't log useless envelope ID on initial connection log.  Problem
                noted by Kari Hurtta of the Finnish Meteorological Institute.
        Convert the free disk space shown in a control socket status query
                to kilobyte units.
        If TryNullMXList is True and there is a temporary DNS failure
                looking up the hostname, requeue the message for a later
                attempt.  Problem noted by Ari Heikkinen of Pohjois-Savo
                Polytechnic.
        Under the proper circumstances, failed connections would be recorded
                as "Bad file number" instead of "Connection failed" in the
                queue file and persistent host status.  Problem noted by
                Graeme Hewson of Oracle.
        Avoid getting into an endless loop if a non-hoststat directory exists
                within the hoststatus directory (e.g., lost+found).
                Patch from Valdis Kletnieks of Virginia Tech.
        Make sure Timeout.queuereturn=now returns a bounce message to the
                sender.  Problem noted by Per Hedeland of Ericsson.
        If a message data file can't be opened at delivery time, panic and
                abort the attempt instead of delivering a message that
                states "<<< No Message Collected >>>".
        Fixup the GID checking code from 8.10.2 as it was overly
                restrictive.  Problem noted by Mark G. Thomas of Mark
                G. Thomas Consulting.
        Preserve source port number instead of replacing it with the ident
                port number (113).
        Document the queue status characters in the mailq man page.
                Suggested by Ulrich Windl of the Universitat Regensburg.
        Process queued items in which none of the recipient addresses have
                host portions (or there are no recipients).  Problem noted
                by Valdis Kletnieks of Virginia Tech.
        If a cached LDAP connection is used for multiple maps, make sure
                only the first to open the connection is allowed to close
                it so a later map close doesn't break the connection for
                other maps.  Problem noted by Wolfgang Hottgenroth of UUNET.
        Netscape's LDAP libraries do not support Kerberos V4
                authentication.  Patch from Rainer Schoepf of the
                University of Mainz.
        Provide workaround for inconsistent handling of data passed
                via callbacks to Cyrus SASL prior to version 1.5.23.
        Mention ENHANCEDSTATUSCODES in the SMTP HELP helpfile.  Omission
                noted by Ulrich Windl of the Universitat Regensburg.
        Portability:
                Add the ability to read IPv6 interface addresses into class
                        'w' under FreeBSD (and possibly others).  From Jun
                        Kuriyama of IMG SRC, Inc. and the FreeBSD Project.
                Replace code for finding the number of CPUs on HPUX.
                NCRUNIX MP-RAS 3.02 SO_REUSEADDR socket option does not
                        work properly causing problems if the accept()
                        fails and the socket needs to be reopened.  Patch
                        from Tom Moore of NCR.
                NetBSD uses a .0 extension of formatted man pages.  From
                        Andrew Brown of Crossbar Security.
                Return to using the IPv6 AI_DEFAULT flag instead of AI_V4MAPPED
                        for calls to getipnodebyname().  The Linux
                        implementation is broken so AI_ADDRCONFIG is stripped
                        under Linux.  From John Beck of Sun Microsystems and
                        John Kennedy of Cal State University, Chico.
        CONFIG: Catch invalid addresses containing a ',' at the wrong place.
                Patch from Neil Rickert of Northern Illinois University.
        CONFIG: New variables for the new sendmail options:
                confCACERT_PATH                 CACERTPath
                confCACERT                      CACERTFile
                confCLIENT_CERT                 ClientCertFile
                confCLIENT_KEY                  ClientKeyFile
                confDH_PARAMETERS               DHParameters
                confRAND_FILE                   RandFile
                confSERVER_CERT                 ServerCertFile
                confSERVER_KEY                  ServerKeyFile
        CONFIG: Provide basic rulesets for TLS policy control and add new
                tags to the access database to support these policies.  See
                cf/README for more information.
        CONFIG: Add TLS information to the Received: header.
        CONFIG: Call tls_client ruleset from check_mail in case it wasn't
                called due to a STARTTLS command.
        CONFIG: If TLS_PERM_ERR is defined, TLS related errors are permanent
                instead of temporary.
        CONFIG: FEATURE(`relay_hosts_only') didn't work in combination with
                the access map and relaying to a domain without using a To:
                tag.  Problem noted by Mark G. Thomas of Mark G. Thomas
                Consulting.
        CONFIG: Set confEBINDIR to /usr/sbin to match the devtools entry in
                OSTYPE(`linux') and OSTYPE(`mklinux').  From Tim Pierce of
                RootsWeb.com.
        CONFIG: Make sure FEATURE(`nullclient') doesn't use aliasing and
                forwarding to make it as close to the old behavior as
                possible.  Problem noted by George W. Baltz of the
                University of Maryland.
        CONFIG: Added OSTYPE(`darwin') for Mac OS X and Darwin users.  From
                Wilfredo Sanchez of Apple Computer, Inc.
        CONFIG: Changed the map names used by FEATURE(`ldap_routing') from
                ldap_mailhost and ldap_mailroutingaddress to ldapmh and
                ldapmra as underscores in map names cause problems if
                underscore is in OperatorChars.  Problem noted by Bob Zeitz
                of the University of Alberta.
        CONFIG: Apply blacklist_recipients also to hosts in class {w}.
                Patch from Michael Tratz of Esosoft Corporation.
        CONFIG: Use A=TCP ... instead of A=IPC ... in SMTP mailers.
        CONTRIB: Add link_hash.sh to create symbolic links to the hash
                of X.509 certificates.
        CONTRIB: passwd-to-alias.pl:  More protection from special characters;
                treat special shells as root aliases; skip entries where the
                GECOS full name and username match.  From Ulrich Windl of the
                Universitat Regensburg.
        CONTRIB: qtool.pl: Add missing last_modified_time method and fix a
                typo.  Patch from Graeme Hewson of Oracle.
        CONTRIB: re-mqueue.pl: Improve handling of a race between re-mqueue
                and sendmail.  Patch from Graeme Hewson of Oracle.
        CONTRIB: re-mqueue.pl: Don't exit(0) at end so can be called as
                subroutine Patch from Graeme Hewson of Oracle.
        CONTRIB: Add movemail.pl (move old mail messages between queues by
                calling re-mqueue.pl) and movemail.conf (configuration
                script for movemail.pl).  From Graeme Hewson of Oracle.
        CONTRIB: Add cidrexpand (expands CIDR blocks as a preprocessor to
                makemap).  From Derek J. Balling of Yahoo,Inc.
        DEVTOOLS: INSTALL_RAWMAN installation option mistakenly applied any
                extension modifications (e.g., MAN8EXT) to the installation
                target.  Patch from James Ralston of Carnegie Mellon
                University.
        DEVTOOLS: Add support for SunOS 5.9.
        DEVTOOLS: New option confLN contains the command used to create
                links.
        LIBSMDB: Berkeley DB 2.X and 3.X errors might be lost and not
                reported.
        MAIL.LOCAL: DG/UX portability.  Problem noted by Tim Boyer of
                Denman Tire Corporation.
        MAIL.LOCAL: Prevent a possible DoS attack when compiled with
                -DCONTENTLENGTH.  Based on patch from 3APA3A@SECURITY.NNOV.RU.
        MAILSTATS: Fix usage statement (-p and -o are optional).
        MAKEMAP: Change man page layout as workaround for problem with nroff
                and -man on Solaris 7.  Patch from Larry Williamson.
        RMAIL: AIX 4.3 has snprintf().  Problem noted by David Hayes of
                Black Diamond Equipment, Limited.
        RMAIL: Prevent a segmentation fault if the incoming message does not
                have a From line.
        VACATION: Read all of the headers before deciding whether or not
                to respond instead of stopping after finding recipient.
        Added Files:
                cf/ostype/darwin.m4
                contrib/cidrexpand
                contrib/link_hash.sh
                contrib/movemail.conf
                contrib/movemail.pl
                devtools/OS/SunOS.5.9
                test/t_snprintf.c

8.10.2/8.10.2   2000/06/07
        SECURITY: Work around broken Linux setuid() implementation.
                On Linux, a normal user process has the ability to subvert
                the setuid() call such that it is impossible for a root
                process to drop its privileges.  Problem noted by Wojciech
                Purczynski of elzabsoft.pl.
        SECURITY: Add more vigilance around set*uid(), setgid(), setgroups(),
                initgroups(), and chroot() calls.
        Added Files:
                test/t_setuid.c

8.10.1/8.10.1   2000/04/06
        SECURITY: Limit the choice of outgoing (client-side) SMTP
                Authentication mechanisms to those specified in
                AuthMechanisms to prevent information leakage.  We do not
                recommend use of PLAIN for outgoing mail as it sends the
                password in clear text to possibly untrusted servers.  See
                cf/README's DefaultAuthInfo section for additional information.
        Copy the ident argument for openlog() to avoid problems on some
                OSs.  Based on patch from Rob Bajorek from Webhelp.com.
        Avoid bogus error message when reporting an alias line as too long.
        Avoid bogus socket error message if sendmail.cf version level is
                greater than sendmail binary supported version.  Patch
                from John Beck of Sun Microsystems.
        Prevent a malformed ruleset (missing right hand side) from causing
                a segmentation fault when using address test mode.  Based on
                patch from John Beck of Sun Microsystems.
        Prevent memory leak from use of NIS maps and yp_match(3).  Problem
                noted by Gil Kloepfer of the University of Texas at Austin.
        Fix queue file permission checks to allow for TrustedUser ownership.
        Change logging of errors from the trust_auth ruleset to LogLevel 10
                or higher.
        Avoid simple password cracking attacks against SMTP AUTH by using
                exponential delay after too many tries within one connection.
        Encode an initial empty AUTH challenge as '=', not as empty string.
        Avoid segmentation fault on EX_SOFTWARE internal error logs.
                Problem noted by Allan E Johannesen of Worcester
                Polytechnic Institute.
        Ensure that a header check which resolves to $#discard actually
                discards the message.
        Emit missing value warnings for aliases with no right hand side
                when newaliases is run instead of only when delivery is
                attempted to the alias.
        Remove AuthOptions missing value warning for consistency with other
                flag options.
        Portability:
                SECURITY: Specify a run-time shared library search path for
                        AIX 4.X instead of using the dangerous AIX 4.X
                        linker semantics.  AIX 4.X users should consult
                        sendmail/README for further information.  Problem
                        noted by Valdis Kletnieks of Virginia Tech.
                Avoid use of strerror(3) call.  Problem noted by Charles
                        Levert of Ecole Polytechnique de Montreal.
                DGUX requires -lsocket -lnsl and has a non-standard install
                        program.  From Tim Boyer of Denman Tire Corporation.
                HPUX 11.0 has a broken res_search() function.
                Updates to devtools/OS/NeXT.3.X, NeXT.4.X, and NEXTSTEP.4.X
                        from J. P. McCann of E I A.
                Digital UNIX/Compaq Tru64 5.0 now includes snprintf(3).
                        Problem noted by Michael Long of Info Avenue Internet
                        Services, LLC.
                Modern (post-199912) OpenBSD versions include working
                        strlc{at,py}(3) functions.  From Todd C. Miller of
                        Courtesan Consulting.
                SINIX doesn't have random(3).  From Gerald Rinske of
                        Siemens Business Services.
        CONFIG: Change error message about unresolvable sender domain to
                include the sender address.  Proposed by Wolfgang Rupprecht
                of WSRCC.
        CONFIG: Fix usenet mailer calls.
        CONFIG: If RELAY_MAILER_FLAGS is not defined, use SMTP_MAILER_FLAGS
                to be backward compatible with 8.9.
        CONFIG: Change handling of default case @domain for virtusertable
                to allow for +*@domain to deal with +detail.
        CONTRIB: Remove converting.sun.configs -- it is obsolete.
        DEVTOOLS: confUBINMODE was being ignored.  Fix from KITAZIMA, Tuneki
                of NEC.
        DEVTOOLS: Add to NCR platform list and include the architecture
                (i486).  From Tom J. Moore of NCR.
        DEVTOOLS: SECURITY: Change method of linking with sendmail utility
                libraries to work around the AIX 4.X and SunOS 4.X linker's
                overloaded -L option.  Problem noted by Valdis Kletnieks of
                Virginia Tech.
        DEVTOOLS: configure.sh was overriding the user's choice for
                confNROFF.  Problem noted by Glenn A. Malling of Syracuse
                University.
        DEVTOOLS: New variables conf_prog_LIB_POST and confBLDVARIANT added
                for other internal projects but included in the open source
                release.
        LIBSMDB: Check for ".db" instead of simply "db" at the end of the
                map name to determine whether or not to add the extension.
                This fixes makemap when building the userdb file.  Problem
                noted by Andrew J Cole of the University of Leeds.
        LIBSMDB: Allow a database to be opened for updating and created if
                it doesn't already exist.  Problem noted by Rand Wacker of
                Sendmail.
        LIBSMDB: If type is SMDB_TYPE_DEFAULT and both NEWDB and NDBM are
                available, fall back to NDBM if NEWDB open fails.  This
                fixes praliases.  Patch from John Beck of Sun Microsystems.
        LIBSMUTIL: safefile()'s SFF_NOTEXCL check was being misinterpreted
                as SFF_NOWRFILES.
        OP.ME: Clarify some issues regarding mailer flags.  Suggested by
                Martin Mokrejs of The Charles University and Neil Rickert of
                Northern Illinois University.
        PRALIASES: Restore 8.9.X functionality of being able to search for
                particular keys in a database by specifying the keys on the
                command line.  Man page updated accordingly.  Patch from
                John Beck of Sun Microsystems.
        VACATION: SunOS 4.X portability from Charles Levert of Ecole
                Polytechnique de Montreal.
        VACATION: Fix -t option which is ignored but available for
                compatibility with Sun's version, based on patch from
                Volker Dobler of Infratest Burke.
        Added Files:
                devtools/M4/UNIX/smlib.m4
                devtools/OS/OSF1.V5.0
        Deleted Files:
                contrib/converting.sun.configs
        Deleted Directories (already done in 8.10.0 but not listed):
                doc/intro
                doc/usenix
                doc/changes

8.10.0/8.10.0   2000/03/01
            *************************************************************
            * The engineering department at Sendmail, Inc. has suffered *
            * the tragic loss of a key member of our engineering team.  *
            * Julie Van Bourg was the Vice President of Engineering     *
            * at Sendmail, Inc. during the development and deployment   *
            * of this release.  It was her vision, dedication, and      *
            * support that has made this release a success.  Julie died *
            * on October 26, 1999 of cancer.  We have lost a leader, a  *
            * coach, and a friend.                                      *
            *                                                           *
            * This release is dedicated to her memory and to the joy,   *
            * strength, ideals, and hope that she brought to all of us. *
            * Julie, we miss you!                                       *
            *************************************************************
        SECURITY: The safe file checks now back track through symbolic
                links to make sure the files can't be compromised due
                to poor permissions on the parent directories of the
                symbolic link target.
        SECURITY: Only root, TrustedUser, and users in class t can rebuild
                the alias map.  Problem noted by Michal Zalewski of the
                "Internet for Schools" project (IdS).
        SECURITY: There is a potential for a denial of service attack if
                the AutoRebuildAliases option is set as a user can kill the
                sendmail process while it is rebuilding the aliases file
                (leaving it in an inconsistent state).  This option and
                its use is deprecated and will be removed from a future
                version of sendmail.
        SECURITY: Make sure all file descriptors (besides stdin, stdout, and
                stderr) are closed before restarting sendmail.  Problem noted
                by Michal Zalewski of the "Internet for Schools" project
                (IdS).
        Begin using /etc/mail/ for sendmail related files.  This affects
                a large number of files.  See cf/README for more details.
        The directory structure of the distribution has changed slightly
                for easier code sharing among the programs.
        Support SMTP AUTH (see RFC 2554).  New macros for this purpose
                are ${auth_authen}, ${auth_type}, and ${auth_author}
                which hold the client's authentication credentials,
                the mechanism used for authentication, and the
                authorization identity (i.e., the AUTH= parameter if
                supplied).  Based on code contributed by Tim Martin of CMU.
        On systems which use the Torek stdio library (all of the BSD
                distributions), use memory-buffered files to reduce
                file system overhead by not creating temporary files on
                disk.  Contributed by Exactis.com, Inc.
        New option DataFileBufferSize to control the maximum size of a
                memory-buffered data (df) file before a disk-based file is
                used.  Contributed by Exactis.com, Inc.
        New option XscriptFileBufferSize to control the maximum size of a
                memory-buffered transcript (xf) file before a disk-based
                file is used.  Contributed by Exactis.com, Inc.
        sendmail implements RFC 2476 (Message Submission), e.g., it can
                now listen on several different ports.  Use:
                O DaemonPortOptions=Name=MSA, Port=587, M=E
                to run a Message Submission Agent (MSA); this is turned
                on by default in m4-generated .cf files; it can be turned
                off with FEATURE(`no_default_msa').
        The 'XUSR' SMTP command is deprecated.  Mail user agents should
                begin using RFC 2476 Message Submission for initial user
                message submission.  XUSR may disappear from a future release.
        The new '-G' (relay (gateway) submission) command line option
                indicates that the message being submitted from the command
                line is for relaying, not initial submission.  This means
                the message will be rejected if the addresses are not fully
                qualified and no canonicalization will be done.  Future
                releases may even reject improperly formed messages.
        The '-U' (initial user submission) command line option is
                deprecated and may be removed from a future release.
                Mail user agents should begin using '-G' to indicate that
                this is a relay submission (the inverse of -U).
        The next release of sendmail will assume that any message submitted
                from the command line is an initial user submission and act
                accordingly.
        If sendmail doesn't have enough privileges to run a .forward
                program or deliver to file as the owner of that file, the
                address is marked as unsafe.  This means if RunAsUser is
                set, users won't be able to use programs or delivery to
                files in their .forward files.  Administrators can override
                this by setting the DontBlameSendmail option to the new
                setting NonRootSafeAddr.
        Allow group or world writable directories if the sticky bit is set
                on the directory and DontBlameSendmail is set to
                TrustStickyBit.  Based on patch from Chris Metcalf of
                InCert Software.
        Prevent logging of unsafe directory paths for non-existent forward
                files if the new DontWarnForwardFileInUnsafeDirPath bit is
                set in the DontBlameSendmail option.  Requested by many.
        New Timeout.control option to limit the total time spent satisfying
                a control socket request.
        New Timeout.resolver options for controlling BIND resolver
                settings:
                Timeout.resolver.retrans
                        Sets the resolver's retransmission time interval (in
                        seconds).  Sets both Timeout.resolver.retrans.first
                        and Timeout.resolver.retrans.normal.
                Timeout.resolver.retrans.first
                        Sets the resolver's retransmission time interval (in
                        seconds) for the first attempt to deliver a message.
                Timeout.resolver.retrans.normal
                        Sets the resolver's retransmission time interval (in
                        seconds) for all resolver lookups except the first
                        delivery attempt.
                Timeout.resolver.retry
                        Sets the number of times to retransmit a resolver
                        query.  Sets both Timeout.resolver.retry.first
                        and Timeout.resolver.retry.normal.
                Timeout.resolver.retry.first
                        Sets the number of times to retransmit a resolver
                        query for the first attempt to deliver a message.
                Timeout.resolver.retry.normal
                        Sets the number of times to retransmit a resolver
                        query for all resolver lookups except the first
                        delivery attempt.
                Contributed by Exactis.com, Inc.
        Support multiple queue directories.  To use multiple queues, supply
                a QueueDirectory option value ending with an asterisk.  For
                example, /var/spool/mqueue/q* will use all of the
                directories or symbolic links to directories beginning with
                'q' in /var/spool/mqueue as queue directories.  Keep in
                mind, the queue directory structure should not be changed
                while sendmail is running.  Queue runs create a separate
                process for running each queue unless the verbose flag is
                given on a non-daemon queue run.  New items are randomly
                assigned to a queue.  Contributed by Exactis.com, Inc.
        Support different directories for qf, df, and xf queue files; if
                subdirectories or symbolic links to directories of those names
                exist in the queue directories, they are used for the
                corresponding queue files.  Keep in mind, the queue
                directory structure should not be changed while sendmail is
                running.  Proposed by Mathias Koerber of Singapore
                Telecommunications Ltd.
        New queue file naming system which uses a filename guaranteed to be
                unique for 60 years.  This allows queue IDs to be assigned
                without fancy file system locking.  Queued items can be
                moved between queues easily.  Contributed by Exactis.com,
                Inc.
        Messages which are undeliverable due to temporary address failures
                (e.g., DNS failure) will now go to the FallBackMX host, if
                set.  Contributed by Exactis.com, Inc.
        New command line option '-L tag' which sets the identifier used for
                syslog.  Contributed by Exactis.com, Inc.
        QueueSortOrder=Filename will sort the queue by filename.  This
                avoids opening and reading each queue file when preparing
                to run the queue.  Contributed by Exactis.com, Inc.
        Shared memory counters and microtimers functionality has been
                donated by Exactis.com, Inc.
        The SCCS ID tags have been replaced with RCS ID tags.
        Allow trusted users (those on a T line or in $=t) to set the
                QueueDirectory (Q) option without an X-Authentication-Warning:
                being added.  Suggested by Michael K. Sanders.
        IPv6 support based on patches from John Kennedy of Cal State
                University, Chico, Motonori Nakamura of Kyoto University,
                and John Beck of Sun Microsystems.
        In low-disk space situations, where sendmail would previously refuse
                connections, still accept them, but only allow ETRN commands.
                Suggested by Mathias Koerber of Singapore Telecommunications
                Ltd.
        The [IPC] builtin mailer now allows delivery to a UNIX domain socket
                on systems which support them.  This can be used with LMTP
                local delivery agents which listen on a named socket.  An
                example mailer might be:
                        Mexecmail, P=[IPC], F=lsDFMmnqSXzA5@/:|, E=\r\n,
                                S=10, R=20/40, T=DNS/RFC822/X-Unix,
                                A=FILE /var/run/lmtpd
                Code contributed by Lyndon Nerenberg of Messaging Direct.
        The [TCP] builtin mailer name is now deprecated.  Use [IPC]
                instead.
        The first mailer argument in the [IPC] mailer is now checked for a
                legitimate value.  Possible values are TCP (for TCP/IP
                connections), IPC (which will be deprecated in a future
                version), and FILE (for UNIX domain socket delivery).
        PrivacyOptions=goaway no longer includes the noetrn and the noreceipts
                flags.
        PrivacyOptions=nobodyreturn instructs sendmail not to include the
                body of the original message on delivery status
                notifications.
        Don't announce DSN if PrivacyOptions=noreceipts is set.  Problem noted
                by Dan Bernstein, fix from Robert Harker of Harker Systems.
        Accept the SMTP RSET command even when rejecting commands due to TCP
                Wrappers or the check_relay ruleset.  Problem noted by
                Steve Schweinhart of America Online.
        Warn if OperatorChars is set multiple times.  OperatorChars should
                not be set after rulesets are defined.  Suggested by
                Mitchell Blank Jr of Exec-PC.
        Do not report temporary failure on delivery to files.  In
                interactive delivery mode, this would result in two SMTP
                responses after the DATA command.  Problem noted by
                Nik Conwell of Boston University.
        Check file close when mailing to files.  Problem noted by Nik
                Conwell of Boston University.
        Avoid a segmentation fault when using the LDAP map.  Patch from
                Curtis W. Hillegas of Princeton University.
        Always bind to the LDAP server regardless of whether you are using
                ldap_open() or ldap_init().  Fix from Raj Kunjithapadam of
                @Home Network.
        New ruleset trust_auth to determine whether a given AUTH=
                parameter of the MAIL command should be trusted.  See SMTP
                AUTH, cf/README, and doc/op/op.ps.
        Allow new named config file rules check_vrfy, check_expn, and
                check_etrn for VRFY, EXPN, and ETRN commands, respectively,
                similar to check_rcpt etc.
        Introduce new macros ${rcpt_mailer}, ${rcpt_host}, ${rcpt_addr},
                ${mail_mailer}, ${mail_host}, ${mail_addr} that hold
                the results of parsing the RCPT and MAIL arguments, i.e.
                the resolved triplet from $#mailer $@host $:addr.
                From Kari Hurtta of the Finnish Meteorological Institute.
        New macro ${client_resolve} which holds the result of the resolve
                call for ${client_name}: OK, FAIL, FORGED, TEMP.  Proposed
                by Kari Hurtta of the Finnish Meteorological Institute.
        New macros ${dsn_notify}, ${dsn_envid}, and ${dsn_ret} that hold
                the corresponding DSN parameter values.  Proposed by
                Mathias Herberts.
        New macro ${msg_size} which holds the value of the SIZE= parameter,
                i.e., usually the size of the message (in an ESMTP dialogue),
                before the message has been collected, thereafter it holds
                the message size as computed by sendmail (and can be used
                in check_compat).
        The macro ${deliveryMode} now specifies the current delivery mode
                sendmail is using instead of the value of the DeliveryMode
                option.
        New macro ${ntries} holds the number of delivery attempts.
        Drop explicit From: if same as what would be generated only if it is
                a local address.  From Motonori Nakamura of Kyoto University.
        Write pid to file also if sendmail only processes the queue.
                Proposed by Roy J. Mongiovi of Georgia Tech.
        Log "low on disk space" only when necessary.
        New macro ${load_avg} can be used to check the current load average.
                Suggested by Scott Gifford of The Internet Ramp.
        Return-Receipt-To: header implies DSN request if option RrtImpliesDsn
                is set.
        Flag -S for maps to specify the character which is substituted
                for spaces (instead of the default given by O BlankSub).
        Flag -D for maps: perform no lookup in deferred delivery mode.
                This flag is set by default for the host map.  Based on a
                proposal from Ian MacPhedran of the University of Saskatchewan.
        Open maps only on demand, not at startup.
        Log warning about unsupported IP address families.
        New option MaxHeadersLength allows to specify a maximum length
                of the sum of all headers.  This can be used to prevent
                a denial-of-service attack.
        New option MaxMimeHeaderLength which limits the size of MIME
                headers and parameters within those headers.  This option
                is intended to protect mail user agents from buffer
                overflow attacks.
        Added option MaxAliasRecursion to specify the maximum depth of
                alias recursion.
        New flag F=6 for mailers to strip headers to seven bit.
        Map type syslog to log the key via syslogd.
        Entries in the alias file can be continued by putting a backslash
                directly before the newline.
        New option DeadLetterDrop to define the location of the system-wide
                dead.letter file, formerly hardcoded to
                /usr/tmp/dead.letter.  If this option is not set (the
                default), sendmail will not attempt to save to a
                system-wide dead.letter file if it can not bounce the mail
                to the user nor postmaster.  Instead, it will rename the qf
                file as it has in the past when the dead.letter file
                could not be opened.
        New option PidFile to define the location of the pid file.  The
                value of this option is macro expanded.
        New option ProcessTitlePrefix specifies a prefix string for the
                process title shown in 'ps' listings.
        New macros for use with the PidFile and ProcessTitlePrefix options
                (along with the already existing macros):
                ${daemon_info}      Daemon information, e.g.
                                    SMTP+queueing@00:30:00
                ${daemon_addr}      Daemon address, e.g., 0.0.0.0
                ${daemon_family}    Daemon family, e.g., inet, inet6, etc.
                ${daemon_name}      Daemon name, e.g., MSA.
                ${daemon_port}      Daemon port, e.g., 25
                ${queue_interval}   Queue run interval, e.g., 00:30:00
        New macros especially for virtual hosting:
                ${if_name}      hostname of interface of incoming connection.
                ${if_addr}      address of interface of incoming connection.
                The latter is only set if the interface does not belong to the
                loopback net.
        If a message being accepted via a method other than SMTP and
                would be rejected by a header check, do not send the message.
                Suggested by Phil Homewood of Mincom Pty Ltd.
        Don't strip comments for header checks if $>+ is used instead of $>.
                Provide header value as quoted string in the macro
                ${currHeader} (possibly truncated to MAXNAME).  Suggested by
                Jan Krueger of Unix-AG of University of Hannover.
                The length of the header value is stored in ${hdrlen}.
        H*: allows to specify a default ruleset for header checks.  This
                ruleset will only be called if the individual header does
                not have its own ruleset assigned.  Suggested by Jan
                Krueger of Unix-AG of University of Hannover.
                The name of the header field stored in ${hdr_name}.
        Comments (i.e., text within parentheses) in rulesets are not
                removed if the config file version is greater than or equal
                to 9.  For example, "R$+ ( 1 )          $@ 1" matches the
                input "token (1)" but does not match "token".
        Avoid removing the Content-Transfer-Encoding MIME header on
                MIME messages.  Problem noted by Sigurbjorn B. Larusson of
                Multimedia Consumer Services.  Fix from Per Hedeland of
                Ericsson.
        Avoid duplicate Content-Transfer-Encoding MIME header on
                messages with 8-bit text in headers.  Problem noted by
                Per Steinar Iversen of Oslo College.  Fix from Per Hedeland
                of Ericsson.
        Avoid keeping maps locked longer than necessary when re-opening a
                modified database map file.  Problem noted by Chris Adams
                of Renaissance Internet Services.
        Resolving to the $#error mailer with a temporary failure code (e.g.,
                $#error $@ tempfail $: "400 Temporary failure") will now
                queue up the message instead of bouncing it.
        Be more liberal in acceptable responses to an SMTP RSET command as
                standard does not provide any indication of what to do when
                something other than 250 is received.  Based on a patch
                from Steve Schweinhart of America Online.
        New option TrustedUser allows to specify a user who can own
                important files instead of root.  This requires HASFCHOWN.
        Fix USERDB conditional so compiling with NEWDB or HESIOD and
                setting USERDB=0 works.  Fix from Jorg Zanger of Schock.
        Fix another instance (similar to one in 8.9.3) of a network failure
                being mis-logged as "Illegal Seek" instead of whatever
                really went wrong.  From John Beck of Sun Microsystems.
        $? tests also whether the macro is non-null.
        Print an error message if a mailer definition contains an invalid
                equate name.
        New mailer equate /= to specify a directory to chroot() into before
                executing the mailer program.  Suggested by Igor Vinokurov.
        New mailer equate W= to specify the maximum time to wait for the
                mailer to return after sending all data to it.
        Only free memory from the process list when adding a new process
                into a previously filled slot.  Previously, the memory was
                freed at removal time.  Since removal can happen in a
                signal handler, this may leave the memory map in an
                inconsistent state.  Problem noted by Jeff A. Earickson and
                David Cooley of Colby College.
        When using the UserDB @hostname catch-all, do not try to lookup
                local users in the passwd file.  The UserDB code has
                already decided the message will be passed to another host
                for processing.  Fix from Tony Landells of Burdett
                Buckeridge Young Limited.
        Support LDAP authorization via either a file containing the
                password or Kerberos V4 using the new map options
                '-ddistinguished_name', '-Mmethod', and '-Pfilename'.  The
                distinguished_name is who to login as.  The method can be
                one of LDAP_AUTH_NONE, LDAP_AUTH_SIMPLE, or
                LDAP_AUTH_KRBV4.  The filename is the file containing the
                secret key for LDAP_AUTH_SIMPLE or the name of the Kerberos
                ticket file for LDAP_AUTH_KRBV4.  Patch from Booker Bense
                of Stanford University.
        The ldapx map has been renamed to ldap.  The use of ldapx is
                deprecated and will be removed in a future version.
        If the result of an LDAP search returns a multi-valued attribute
                and the map has the column delimiter set, it turns that
                response into a delimiter separated string.  The LDAP map
                will traverse multiple entries as well.  LDAP alias maps
                automatically set the column delimiter to the comma.
                Based on patch from Booker Bense of Stanford University and
                idea from Philip A. Prindeville of Mirapoint, Inc.
        Support return of multiple values for a single LDAP lookup.  The
                values to be returned should be in a comma separated string.
                For example, `-v "email,emailother"'.  Patch from
                Curtis W. Hillegas of Princeton University.
        Allow the use of LDAP for alias maps.
        If no LDAP attributes are specified in an LDAP map declaration, all
                attributes found in the match will be returned.
        Prevent commas in quoted strings in the AliasFile value from
                breaking up a single entry into multiple entries.  This is
                needed for LDAP alias file specifications to allow for
                comma separated key and value strings.
        Keep connections to LDAP server open instead of opening and closing
                for each lookup.  To reduce overhead, sendmail will cache
                connections such that multiple maps which use the same
                host, port, bind DN, and authentication will only result in
                a single connection to that host.
        Put timeout in the proper place for USE_LDAP_INIT.
        Be more careful about checking for errors and freeing memory on
                LDAP lookups.
        Use asynchronous LDAP searches to save memory and network
                resources.
        Do not copy LDAP query results if the map's match only flag is set.
        Increase portability to the Netscape LDAP libraries.
        Change the parsing of the LDAP filter specification.  '%s' is still
                replaced with the literal contents of the map lookup key --
                note that this means a lookup can be done using the LDAP
                special characters.  The new '%0' token can be used instead
                of '%s' to encode the key buffer according to RFC 2254.
                For example, if the LDAP map specification contains '-k
                "(user=%s)"' and a lookup is done on "*", this would be
                equivalent to '-k "(user=*)"' -- matching ANY record with a
                user attribute.  Instead, if the LDAP map specification
                contains '-k "(user=%0)"' and a lookup is done on "*", this
                would be equivalent to '-k "(user=\2A)"' -- matching a user
                with the name "*".
        New LDAP map flags: "-1" requires a single match to be returned, if
                more than one is returned, it is equivalent to no records
                being found; "-r never|always|search|find" sets the LDAP
                alias dereference option; "-Z size" limits the number of
                matches to return.
        New option LDAPDefaultSpec allows a default map specification for
                LDAP maps.  The value should only contain LDAP specific
                settings such as "-h host -p port -d bindDN", etc.  The
                settings will be used for all LDAP maps unless they are
                specified in the individual map specification ('K'
                command).  This option should be set before any LDAP maps
                are defined.
        Prevent an NDBM alias file opening loop when the NDBM open
                continually fails.  Fix from Roy J. Mongiovi of Georgia
                Tech.
        Reduce memory utilization for smaller symbol table entries.  In
                particular, class entries get much smaller, which can be
                important if you have large classes.
        On network-related temporary failures, record the hostname which
                gave error in the queued status message.  Requested by
                Ulrich Windl of the Universitat Regensburg.
        Add new F=% mailer flag to allow for a store and forward
                configuration.  Mailers which have this flag will not attempt
                delivery on initial receipt of a message or on queue runs
                unless the queued message is selected using one of the
                -qI/-qR/-qS queue run modifiers or an ETRN request.  Code
                provided by Philip Guenther of Gustavus Adolphus College.
        New option ControlSocketName which, when set, creates a daemon
                control socket.  This socket allows an external program to
                control and query status from the running sendmail daemon
                via a named socket, similar to the ctlinnd interface to the
                INN news server.  Access to this interface is controlled by
                the UNIX file permissions on the named socket on most UNIX
                systems (see sendmail/README for more information).  An
                example control program is provided as contrib/smcontrol.pl.
        Change the default values of QueueLA from 8 to (8 * numproc) and
                RefuseLA from 12 to (12 * numproc) where numproc is the
                number of processors online on the system (if that can be
                determined).  For single processor machines, this change
                has no effect.
        Don't return body of message to postmaster on "Too many hops" bounces.
                Based on fix from Motonori Nakamura of Kyoto University.
        Give more detailed DSN descriptions for some cases.  Patch from
                Motonori Nakamura of Kyoto University.
        Logging of alias, forward file, and UserDB expansion now happens
                at LogLevel 11 or higher instead of 10 or higher.
        Logging of an envelope's complete delivery (the "done" message) now
                happens at LogLevel 10 or higher instead of 11 or higher.
        Logging of TCP/IP or UNIX standard input connections now happens at
                LogLevel 10 or higher.  Previously, only TCP/IP connections
                were logged, and on at LogLevel 12 or higher.  Setting
                LogLevel to 10 will now assist users in tracking frequent
                connection-based denial of service attacks.
        Log basic information about authenticated connections at LogLevel
                10 or higher.
        Log SMTP Authentication mechanism and author when logging the sender
                information (from= syslog line).
        Log the DSN code for each recipient if one is available as a new
                equate (dsn=).
        Macro expand PostmasterCopy and DoubleBounceAddress options.
        New "ph" map for performing ph queries in rulesets.  More
                information is available at
                http://www-dev.cso.uiuc.edu/sendmail/.  Contributed by Mark
                Roth of the University of Illinois at Urbana-Champaign.
        Detect temporary lookup failures in the host map if looking up a
                bracketed IP address.  Problem noted by Kari Hurtta of the
                Finnish Meteorological Institute.
        Do not report a Remote-MTA on local deliveries.  Problem noted by
                Kari Hurtta of the Finnish Meteorological Institute.
        When a forward file points to an alias which runs a program, run
                the program as the default user and the default group, not
                the forward file user.  This change also assures the
                :include: directives in aliases are also processed using
                the default user and group.  Problem noted by Sergiu
                Popovici of DNT Romania.
        Prevent attempts to save a dead.letter file for a user with
                no home directory (/no/such/directory).  Problem noted by
                Michael Brown of Finnigan FT/MS.
        Include message delay and number of tries when logging that a
                message has been completely delivered (LogLevel of 10 or
                above).  Suggested by Nick Hilliard of Ireland Online.
        Log the sender of a message even if none of the recipients were
                accepted.  If some of the recipients were rejected, it is
                helpful to know the sender of the message.
        Check the root directory (/) when checking a path for safety.
                Problem noted by John Beck of Sun Microsystems.
        Prevent multiple responses to the DATA command if DeliveryMode is
                interactive and delivering to an alias which resolves to
                multiple files.
        Macros in the helpfile are expanded if the helpfile version is 2 or
                greater (see below); the help function doesn't print the
                version of sendmail any longer, instead it is placed in
                the helpfile ($v).  Suggested by Chuck Foster of UUNET
                PIPEX.  Additionally, comment lines (starting with #) are
                skipped and a version line (#vers) is introduced.  The
                helpfile version for 8.10.0 is 2, if no version or an older
                version is found, a warning is logged.  The '#vers'
                directive should be placed at the top of the help file.
        Use fsync() when delivering to a file to guarantee the delivery to
                disk succeeded.  Suggested by Nick Christenson.
        If delivery to a file is unsuccessful, truncate the file back to its
                length before the attempt.
        If a forward points to a filename for delivery, change to the
                user's uid before checking permissions on the file.  This
                allows delivery to files on NFS mounted directories where
                root is remapped to nobody.  Problem noted by Harald
                Daeubler of Universitaet Ulm.
        purgestat and sendmail -bH purge only expired (Timeout.hoststatus)
                host status files, not all files.
        Any macros stored in the class $={persistentMacros} will be saved
                in the queue file for the message and set when delivery
                is attempted on the queued item.  Suggested by Kyle Jones of
                Wonderworks Inc.
        Add support for storing information between rulesets using the new
                macro map class.  This can be used to store information
                between queue runs as well using $={persistentMacros}.
                Based on an idea from Jan Krueger of Unix-AG of University
                of Hannover.
        New map class arith to allow for computations in rules.  The
                operation (+, -, *, /, l (for less than), and =) is given
                as key.  The two operands are specified as arguments; the
                lookup returns the result of the computation.  For example,
                "$(arith l $@ 4 $@ 2 $)" will return "FALSE" and
                "$(arith + $@ 4 $@ 2 $)" will return "6".
        Add new syntax for header declarations which decide whether to
                include the header based on a macro rather than a mailer
                flag:
                        H?${MyMacro}?X-My-Header: ${MyMacro}
                This should be used along with $={persistentMacros}.
                It can be used for adding headers to a message based on
                the results of check_* and header check rulesets.
        Allow new named config file rule check_eoh which is called after
                all of the headers have been collected.  The input to the
                ruleset the number of headers and the size of all of the
                headers in bytes separated by $|.  This ruleset along with
                the macro storage map can be used to correlate information
                gathered between headers and to check for missing headers.
                See cf/README or doc/op/op.ps for an example.
        Change the default for the MeToo option to True to correspond
                to the clarification in the DRUMS SMTP Update spec.  This
                option is deprecated and will be removed from a future
                version.
        Change the sendmail binary default for SendMimeErrors to True.
        Change the sendmail binary default for SuperSafe to True.
        Display ruleset names in debug and address test mode output
                if referencing a named ruleset.
        New mailer equate m= which will limit the number of messages
                delivered per connection on an SMTP or LMTP mailer.
        Improve QueueSortOrder=Host by reversing the hostname before
                using it to sort.  Now all the same domains are really run
                through the queue together.  If they have the same MX host,
                then they will have a much better opportunity to use the
                connection cache if available.  This should be a reasonable
                performance improvement.  Patch from Randall Winchester of
                the University of Maryland.
        If a message is rejected by a header check ruleset, log who would
                have received the message if it had not been rejected.
        New "now" value for Timeout.queuereturn to bounce entries from the
                queue immediately.  No delivery attempt is made.
        Increase sleeping time exponentially after too many "bad" commands
                up to 4 minutes delay (compare MAX{BAD,NOOP,HELO,VRFY,ETRN}-
                COMMANDS).
        New option ClientPortOptions similar to DaemonPortOptions
                but for outgoing connections.
        New suboptions for DaemonPortOptions: Name (a name used for
                error messages and logging) and Modifiers, i.e.
                        a       require authentication
                        b       bind to interface through which mail has
                                been received
                        c       perform hostname canonification
                        f       require fully qualified hostname
                        h       use name of interface for outgoing HELO
                                command
                        C       don't perform hostname canonification
                        E       disallow ETRN (see RFC 2476)
        New suboption for ClientPortOptions: Modifiers, i.e.
                        h       use name of interface for HELO command
        The version number for queue files (qf) has been incremented to 4.
        Log unacceptable HELO/EHLO domain name attempts if LogLevel is set
                to 10 or higher.  Suggested by Rick Troxel of the National
                Institutes of Health.
        If a mailer dies, print the status in decimal instead of octal
                format.  Suggested by Michael Shapiro of Sun Microsystems.
        Limit the length of all MX records considered for delivery to 8k.
        Move message priority from sender to recipient logging.  Suggested by
                Ulrich Windl of the Universitat Regensburg.
        Add support for Berkeley DB 3.X.
        Add fix for Berkeley DB 2.X fcntl() locking race condition.
                Requires a post-2.7.5 version of Berkeley DB.
        Support writing traffic log (sendmail -X option) to a FIFO.
                Patch submitted by Rick Heaton of Network Associates, Inc.
        Do not ignore Timeout settings in the .cf file when a Timeout
                sub-options is set on the command line.  Problem noted by
                Graeme Hewson of Oracle.
        Randomize equal preference MX records each time delivery is
                attempted via a new connection to a host instead of once per
                session.  Suggested by Scott Salvidio of Compaq.
        Implement enhanced status codes as defined by RFC 2034.
        Add [hostname] to class w for the names of all interfaces unless
                DontProbeInterfaces is set. This is useful for sending mails
                to hosts which have dynamically assigned names.
        If a message is bounced due to bad MIME conformance, avoid bouncing
                the bounce for the same reason.  If the body is not 8-bit
                clean, and EightBitMode isn't set to pass8, the body will
                not be included in the bounce.  Problem noted by Valdis
                Kletnieks of Virginia Tech.
        The timeout for sending a message via SMTP has been changed from
                '${msgsize} / 16 + (${nrcpts} * 300)' to a timeout which
                simply checks for progress on sending data every 5 minutes.
                This will detect the inability to send information quicker
                and reduce the number of processes simply waiting to
                timeout.
        Prevent a segmentation fault on systems which give a partial filled
                interface address structure when loading the system network
                interface addresses.  Fix from Reinier Bezuidenhout of
                Nanoteq.
        Add a compile-time configuration macro, MAXINTERFACES, which
                indicates the number of interfaces to read when probing
                for hostnames and IP addresses for class w ($=w).  The
                default value is 512.  Based on idea from Reinier
                Bezuidenhout of Nanoteq.
        If the RefuseLA option is set to 0, do not reject connections based
                on load average.
        Allow ruleset 0 to have a name.  Problem noted by Neil Rickert of
                Northern Illinois University.
        Expand the Return-Path: header at delivery time, after "owner-"
                envelope splitting has occurred.
        Don't try to sort the queue if there are no entries. Patch from
                Luke Mewburn from RMIT University.
        Add a "/quit" command to address test mode.
        Include the proper sender in the UNIX "From " line and Return-Path:
                header when undeliverable mail is saved to ~/dead.letter.
                Problem noted by Kari Hurtta of the Finnish Meteorological
                Institute.
        The contents of a class can now be copied to another class using
                the syntax: "C{Dest} $={Source}".  This would copy all of
                the items in class $={Source} into the class $={Dest}.
        Include original envelope's error transcript in bounces created for
                split (owner-) envelopes to see the original errors when
                the recipients were added.  Based on fix from Motonori
                Nakamura of Kyoto University.
        Show reason for permanent delivery errors directly after the
                addresses.  From Motonori Nakamura of Kyoto University.
        Prevent a segmentation fault when bouncing a split-envelope
                message.  Patch from Motonori Nakamura of Kyoto University.
        If the specification for the queue run interval (-q###) has a
                syntax error, consider the error fatal and exit.
        Pay attention to CheckpointInterval during LMTP delivery.  Problem
                noted by Motonori Nakamura of Kyoto University.
        On operating systems which have setlogin(2), use it to set the
                login name to the RunAsUserName when starting as a daemon.
                This is for delivery to programs which use getlogin().
                Based on fix from Motonori Nakamura of Kyoto University.
        Differentiate between "command not implemented" and "command
                unrecognized" in the SMTP dialogue.
        Strip returns from forward and include files.  Problem noted by
                Allan E Johannesen of Worcester Polytechnic Institute.
        Prevent a core dump when using 'sendmail -bv' on an address which
                resolves to the $#error mailer with a temporary failure.
                Based on fix from Neil Rickert of Northern Illinois
                University.
        Prevent multiple deliveries of a message with a "non-local alias"
                pointing to a local user, if canonicalization fails
                the message was requeued *and* delivered to the alias.
        If an invalid ruleset is declared, the ruleset name could be
                ignored and its rules added to S0.  Instead, ignore the
                ruleset lines as well.
        Avoid incorrect Final-Recipient, Action, and X-Actual-Recipient
                success DSN fields as well as duplicate entries for a
                single address due to S5 and UserDB processing.  Problems
                noted by Kari Hurtta of the Finnish Meteorological
                Institute.
        Turn off timeouts when exiting sendmail due to an interrupt signal
                to prevent the timeout from firing during the exit process.
                Problem noted by Michael Shapiro of Sun Microsystems.
        Do not append @MyHostName to non-RFC822 addresses output by the EXPN
                command or on Final-Recipient: and X-Actual-Recipient: DSN
                headers.  Non-RFC822 addresses include deliveries to
                programs, file, DECnet, etc.
        Fix logic for determining if a local user is using -f or -bs to
                spoof their return address.  Based on idea from Neil Rickert
                of Northern Illinois University and patch from Per Hedeland
                of Ericsson.
        Report the proper UID in the bounce message if an :include: file is
                owned by a uid that doesn't map to a username and the
                :include: file contains delivery to a file or program.
                Problem noted by John Beck of Sun Microsystems.
        Avoid the attempt of trying to send a second SMTP QUIT command if
                the remote server responds to the first QUIT with a 4xx
                response code and drops the connection.  This behavior was
                noted by Ulrich Windl of the Universitat Regensburg when
                sendmail was talking to the Mercury 1.43 MTA.
        If a hostname lookup times out and ServiceSwitchFile is set but the
                file is not present, the lookup failure would be marked as
                a permanent failure instead of a temporary failure.  Fix
                from Russell King of the ARM Linux Project.
        Handle aliases or forwards which deliver to programs using tabs
                instead of spaces between arguments.  Problem noted by Randy
                Wormser.  Fix from Neil Rickert of Northern Illinois
                University.
        Allow MaxRecipientsPerMessage option to be set on the command line
                by normal users (e.g., sendmail won't drop its root
                privileges) to allow overrides for message submission via
                'sendmail -bs'.
        Set the names for help file and statistics file to "helpfile" and
                "statistics", respectively, if no parameters are given for
                them in the .cf file.
        Avoid bogus 'errbody: I/O Error -7' log messages when sending
                success DSN messages for messages relayed to non-DSN aware
                systems.  Problem noted by Juergen Georgi of RUS University
                of Stuttgart and Kyle Tucker of Parexel International.
        Prevent +detail information from interfering with local delivery to
                multiple users in the same transaction (F=m).
        Add H_FORCE flag for the X-Authentication-Warning: header, so it
                will be added even if one already exists.  Problem noted
                by Michal Zalewski of Marchew Industries.
        Stop processing SMTP commands if the SMTP connection is dropped.
                This prevents a remote system from flooding the connection
                with commands and then disconnecting.  Previously, the
                server would process all of the buffered commands.  Problem
                noted by Michal Zalewski of Marchew Industries.
        Properly process user-supplied headers beginning with '?'.  Problem
                noted by Michal Zalewski of Marchew Industries.
        If multiple header checks resolve to the $#error mailer, use the
                last permanent (5XX) failure if any exist.  Otherwise, use
                the last temporary (4XX) failure.
        RFC 1891 requires "hexchar" in a "xtext" to be upper case.  Patch
                from Ronald F. Guilmette of Infinite Monkeys & Co.
        Timeout.ident now defaults to 5 seconds instead of 30 seconds to
                prevent the now common delays associated with mailing to a
                site which drops IDENT packets.  Suggested by many.
        Persistent host status data is not reloaded disk when current data
                is available in the in-memory cache.  Problem noted by Per
                Hedeland of Ericsson.
        mailq displays unprintable characters in addresses as their octal
                representation and a leading backslash.  This avoids problems
                with "unprintable" characters.  Problem noted by Michal
                Zalewski of the "Internet for Schools" project (IdS).
        The mail line length limit (L= equate) was adding the '!' indicator
                one character past the limit.  This would cause subsequent
                hops to break the line again.  The '!' is now placed in
                the last column of the limit if the line needs to be broken.
                Problem noted by Joe Pruett of Q7 Enterprises.  Based on fix
                from Per Hedeland of Ericsson.
        If a resolver ANY query is larger than the UDP packet size, the
                resolver will fall back to TCP.  However, some
                misconfigured firewalls black 53/TCP so the ANY lookup
                fails whereas an MX or A record might succeed.  Therefore,
                don't fail on ANY queries.
        If an SMTP recipient is rejected due to syntax errors in the
                address, do not send an empty postmaster notification DSN
                to the postmaster.  Problem noted by Neil Rickert of
                Northern Illinois University.
        Allow '_' and '.' in map names when parsing a sequence map
                specification.  Patch from William Setzer of North Carolina
                State University.
        Fix hostname in logging of read timeouts for the QUIT command on
                cached connections.  Problem noted by Neil Rickert of
                Northern Illinois University.
        Use a more descriptive entry to log "null" connections, i.e.,
                "host did not issue MAIL/EXPN/VRFY/ETRN during connection".
        Fix a file descriptor leak in ONEX mode.
        Portability:
                Reverse signal handling logic such that sigaction(2) with
                        the SA_RESTART flag is the preferred method and the
                        other signal methods are only tried if SA_RESTART
                        is not available.  Problem noted by Allan E
                        Johannesen of Worcester Polytechnic Institute.
                AIX 4.x supports the sa_len member of struct sockaddr.
                        This allows network interface probing to work
                        properly.  Fix from David Bronder of the
                        University of Iowa.
                AIX 4.3 has snprintf() support.
                Use "PPC" as the architecture name when building under
                        AIX.  This will be reflected in the obj.* directory
                        name.
                Apple Darwin support based on Apple Rhapsody port.
                Fixed AIX 'make depend' method from Valdis Kletnieks of
                        Virginia Tech.
                Digital UNIX has uname(2).
                GNU Hurd updates from Mark Kettenis of the University of
                        Amsterdam.
                Improved HPUX 11.0 portability.
                Properly determine the number of CPUs on FreeBSD 2.X,
                        FreeBSD 3.X, HP/UX 10.X and HP/UX 11.X.
                Remove special IRIX ABI cases from Build script and the OS
                        files.  Use the standard 'cc' options used by SGI
                        in building the operating system.  Users can
                        override the defaults by setting confCC and
                        confLIBSEARCHPATH appropriately.
                IRIX nsd map support from Bob Mende of SGI.
                Minor devtools fixes for IRIX from Bob Mende of SGI.
                Linux patch for IP_SRCROUTE support from Joerg Dorchain
                        of MW EDV & ELECTRONIC.
                Linux now uses /usr/sbin for confEBINDIR in the build
                        system.  From MATSUURA Takanori of Osaka University.
                Remove special treatment for Linux PPC in the build
                        system.  From MATSUURA Takanori of Osaka University.
                Motorolla UNIX SYSTEM V/88 Release 4.0 support from
                        Sergey Rusanov of the Republic of Udmurtia.
                NCR MP-RAS 3.x includes regular expression support.  From
                        Tom J. Moore of NCR.
                NEC EWS-UX/V series settings for _PATH_VENDOR_CF and
                        _PATH_SENDMAILPID from Oota Toshiya of
                        NEC Computers Group Planning Division.
                Minor NetBSD owner/group tweaks from Ayamura Kikuchi, M.D.
                NEWS-OS 6.X listed SYSLOG_BUFSIZE as 256 in confENVDEF and
                        1024 in conf.h.  Since confENVDEF would be used,
                        use that value in conf.h.
                Use NeXT's NETINFO to get domain name.  From Gerd Knops of
                        BITart Consulting.
                Use NeXT's NETINFO for alias and hostname resolution if
                        AUTO_NETINFO_ALIASES and AUTO_NETINFO_HOSTS are
                        defined.  Patch from Wilfredo Sanchez of Apple
                        Computer, Inc.
                NeXT portability tweaks.  Problems reported by Dragan
                        Milicic of the University of Utah and J. P. McCann
                        of E I A.
                New compile flag FAST_PID_RECYCLE: set this if your system
                        can reuse the same PID in the same second.
                New compile flag HASFCHOWN: set this if your OS has
                        fchown(2).
                New compile flag HASRANDOM: set this to 0 if your OS does
                        not have random(3).  rand() will be used instead.
                New compile flag HASSRANDOMDEV: set this if your OS has
                        srandomdev(3).
                New compile flag HASSETLOGIN: set this if your OS has
                        setlogin(2).
                Replace SINIX and ReliantUNIX support with version
                        specific SINIX files.  From Gerald Rinske of
                        Siemens Business Services.
                Use the 60-second load average instead of the 5 second load
                        average on Compaq Tru64 UNIX (formerly Digital
                        UNIX).  From Chris Teakle of the University of Qld.
                Use ANSI C by default for Compaq Tru64 UNIX.  Suggested by
                        Randall Winchester of Swales Aerospace.
                Correct setgroups() prototype for Compaq Tru64 UNIX.
                        Problem noted by Randall Winchester of Swales
                        Aerospace.
                Hitachi 3050R/3050RX and 3500 Workstations running
                        HI-UX/WE2 4.02, 6.10 and 7.10 from Motonori
                        NAKAMURA of Kyoto University.
                New compile flag NO_GETSERVBYNAME: set this to disable
                        use of getservbyname() on systems which can
                        not lookup a service by name over NIS, such as
                        HI-UX.  Patch from Motonori NAKAMURA of Kyoto
                        University.
                Use devtools/bin/install.sh on SCO 5.x.  Problem noted
                        by Sun Wenbing of the China Engineering and
                        Technology Information Network.
                make depend didn't work properly on UNIXWARE 4.2.  Problem
                        noted by Ariel Malik of Netology, Ltd.
                Use /usr/lbin as confEBINDIR for Compaq Tru64 (Digital UNIX).
                Set confSTDIO_TYPE to torek for BSD-OS, FreeBSD, NetBSD,
                        and OpenBSD.
                A recent Compaq Ultrix 4.5 Y2K patch has broken detection
                        of local_hostname_length().  See sendmail/README
                        for more details.  Problem noted by Allan E
                        Johannesen of Worcester Polytechnic Institute.
        CONFIG: Begin using /etc/mail/ for sendmail related files.  This
                affects a large number of files.  See cf/README for more
                details.
        CONFIG: New macro MAIL_SETTINGS_DIR contains the path (including
                trailing slash) for the mail settings directory.
        CONFIG: Increment version number of config file to 9.
        CONFIG: OSTYPE(`bsdi1.0') and OSTYPE(`bsdi2.0') have been
                deprecated and may be removed from a future release.
                BSD/OS users should begin using OSTYPE(`bsdi').
        CONFIG: OpenBSD 2.4 installs mail.local non-set-user-ID root.  This
                requires a new OSTYPE(`openbsd').  From Todd C. Miller of
                Courtesan Consulting.
        CONFIG: New OSTYPE(`hpux11') for HP/UX 11.X.
        CONFIG: A syntax error in check_mail would cause fake top-level
                domains (.BITNET, .DECNET, .FAX, .USENET, and .UUCP) to
                be improperly rejected as unresolvable.
        CONFIG: New FEATURE(`dnsbl') takes up to two arguments (name of
                DNS server, rejection message) and can be included
                multiple times.
        CONFIG: New FEATURE(`relay_mail_from') allows relaying if the
                mail sender is listed as RELAY in the access map (and tagged
                with From:).
        CONFIG: Optional tagging of LHS in the access map (Connect:,
                From:, To:) to enable finer control.
        CONFIG: New FEATURE(`ldap_routing') implements LDAP address
                routing.  See cf/README for a complete description of the
                new functionality.
        CONFIG: New variables for the new sendmail options:
                confAUTH_MECHANISMS             AuthMechanisms
                confAUTH_OPTIONS                AuthOptions
                confCLIENT_OPTIONS              ClientPortOptions
                confCONTROL_SOCKET_NAME         ControlSocketName
                confDEAD_LETTER_DROP            DeadLetterDrop
                confDEF_AUTH_INFO               DefaultAuthInfo
                confDF_BUFFER_SIZE              DataFileBufferSize
                confLDAP_DEFAULT_SPEC           LDAPDefaultSpec
                confMAX_ALIAS_RECURSION         MaxAliasRecursion
                confMAX_HEADERS_LENGTH          MaxHeadersLength
                confMAX_MIME_HEADER_LENGTH      MaxMimeHeaderLength
                confPID_FILE                    PidFile
                confPROCESS_TITLE_PREFIX        ProcessTitlePrefix
                confRRT_IMPLIES_DSN             RrtImpliesDsn
                confTO_CONTROL                  Timeout.control
                confTO_RESOLVER_RETRANS         Timeout.resolver.retrans
                confTO_RESOLVER_RETRANS_FIRST   Timeout.resolver.retrans.first
                confTO_RESOLVER_RETRANS_NORMAL  Timeout.resolver.retrans.normal
                confTO_RESOLVER_RETRY           Timeout.resolver.retry
                confTO_RESOLVER_RETRY_FIRST     Timeout.resolver.retry.first
                confTO_RESOLVER_RETRY_NORMAL    Timeout.resolver.retry.normal
                confTRUSTED_USER                TrustedUser
                confXF_BUFFER_SIZE              XscriptFileBufferSize
        CONFIG: confDAEMON_OPTIONS has been replaced by DAEMON_OPTIONS(),
                which takes the options as argument and can be used
                multiple times; see cf/README for details.
        CONFIG: Add a fifth mailer definition to MAILER(`smtp') called
                "dsmtp".  This mail provides on-demand delivery using the
                F=% mailer flag described above.  The "dsmtp" mailer
                definition uses the new DSMTP_MAILER_ARGS which defaults
                to "IPC $h".
        CONFIG: New variables LOCAL_MAILER_MAXMSGS, SMTP_MAILER_MAXMSGS,
                and RELAY_MAILER_MAXMSGS for setting the m= equate for the
                local, smtp, and relay mailers respectively.
        CONFIG: New variable LOCAL_MAILER_DSN_DIAGNOSTIC_CODE for setting
                the DSN Diagnostic-Code type for the local mailer.  The
                value should be changed with care.
        CONFIG: FEATURE(`local_lmtp') now sets the DSN Diagnostic-Code type
                for the local mailer to the proper value of "SMTP".
        CONFIG: All included maps are no longer optional by default; if
                there there is a problem with a map, sendmail will
                complain.
        CONFIG: Removed root from class E; use EXPOSED_USER(`root')
                to get the old behavior.  Suggested by Joe Pruett
                of Q7 Enterprises.
        CONFIG: MASQUERADE_EXCEPTION() defines hosts/subdomains which
                will not be masqueraded.  Proposed by Arne Wichmann
                of MPI Saarbruecken, Griff Miller of PGS Tensor,
                Jayme Cox of Broderbund Software Inc.
        CONFIG: A list of exceptions for FEATURE(`nocanonify') can be
                specified by CANONIFY_DOMAIN or CANONIFY_DOMAIN_FILE,
                i.e., a list of domains which are passed to $[ ... $]
                for canonification. Based on an idea from Neil Rickert
                of Northern Illinois University.
        CONFIG: If `canonify_hosts' is specified as parameter for
                FEATURE(`nocanonify') then addresses which have only
                a hostname, e.g., <user@host>, will be canonified.
        CONFIG: If FEATURE(`nocanonify') is turned on, a trailing dot is
                nevertheless added to addresses with more than one component
                in it.
        CONFIG: Canonification is no longer attempted for any host or domain
                in class 'P' ($=P).
        CONFIG: New class for matching virtusertable entries $={VirtHost} that
                can be populated by VIRTUSER_DOMAIN or VIRTUSER_DOMAIN_FILE.
                FEATURE(`virtuser_entire_domain') can be used to apply this
                class also to entire subdomains.  Hosts in this class are
                treated as canonical in SCanonify2, i.e., a trailing dot
                is added.
        CONFIG: If VIRTUSER_DOMAIN() or VIRTUSER_DOMAIN_FILE() are used,
                include $={VirtHost} in $=R (hosts allowed to relay).
        CONFIG: FEATURE(`generics_entire_domain') can be used to apply the
                genericstable also to subdomains of $=G.
        CONFIG: Pass "+detail" as %2 for virtusertable lookups.
                Patch from Noam Freedman from University of Chicago.
        CONFIG: Pass "+detail" as %1 for genericstable lookups.  Suggested
                by Raymond S Brand of rsbx.net.
        CONFIG: Allow @domain in genericstable to override masquerading.
                Suggested by Owen Duffy from Owen Duffy & Associates.
        CONFIG: LOCAL_DOMAIN() adds entries to class w.  Suggested by Steve
                Hubert of University of Washington.
        CONFIG: OSTYPE(`gnuhurd') has been replaced by OSTYPE(`gnu') as
                GNU is now the canonical system name.  From Mark
                Kettenis of the University of Amsterdam.
        CONFIG: OSTYPE(`unixware7') updates from Larry Rosenman.
        CONFIG: Do not include '=' in option expansion if there is no value
                associated with the option.  From Andrew Brown of
                Graffiti World Wide, Inc.
        CONFIG: Add MAILER(`qpage') to define a new pager mailer.  Contributed
                by Philip A. Prindeville of Enteka Enterprise Technology
                Services.
        CONFIG: MAILER(`cyrus') was not preserving case for mail folder
                names.  Problem noted by Randall Winchester of Swales
                Aerospace.
        CONFIG: RELAY_MAILER_FLAGS can be used to define additional flags
                for the relay mailer.  Suggested by Doug Hughes of Auburn
                University and Brian Candler.
        CONFIG: LOCAL_MAILER_FLAGS now includes 'P' (Add Return-Path:
                header) by default.  Suggested by Per Hedeland of Ericsson.
        CONFIG: Use SMART_HOST for bracketed addresses, e.g., user@[host].
                Suggested by Kari Hurtta of the Finnish Meteorological
                Institute.
        CONFIG: New macro MODIFY_MAILER_FLAGS to tweak *_MAILER_FLAGS;
                i.e., to set, add, or delete flags.
        CONFIG: If SMTP AUTH is used then relaying is allowed for any user
                who authenticated via a "trusted" mechanism, i.e., one that
                is defined via TRUST_AUTH_MECH(`list of mechanisms').
        CONFIG: FEATURE(`delay_checks') delays check_mail and check_relay
                after check_rcpt and allows for exceptions from the checks.
        CONFIG: Map declarations have been moved into their associated
                feature files to allow greater flexibility in use of
                sequence maps.  Suggested by Per Hedeland of Ericsson.
        CONFIG: New macro LOCAL_MAILER_EOL to override the default end of
                line string for the local mailer.  Requested by Il Oh of
                Willamette Industries, Inc.
        CONFIG: Route addresses are stripped, i.e., <@a,@b,@c:user@d> is
                converted to <user@d>
        CONFIG: Reject bogus return address of <@@hostname>, generated by
                Sun's older, broken configuration files.
        CONFIG: FEATURE(`nullclient') now provides the full rulesets of a
                normal configuration, allowing anti-spam checks to be
                performed.
        CONFIG: Don't return a permanent error (Relaying denied) if
                ${client_name} can't be resolved just temporarily.
                Suggested by Kari Hurtta of the Finnish Meteorological
                Institute.
        CONFIG: Change numbered rulesets into named (which still can
                be accessed by their numbers).
        CONFIG: FEATURE(`nouucp') takes one parameter: reject or nospecial
                which describes whether to disallow "!" in the local part
                of an address.
        CONFIG: Call Local_localaddr from localaddr (S5) which can be used
                to rewrite an address from a mailer which has the F=5 flag
                set.  If the ruleset returns a mailer, the appropriate
                action is taken, otherwise the returned tokens are ignored.
        CONFIG: cf/ostype/solaris.m4 has been renamed to solaris2.pre5.m4
                and cf/ostype/solaris2.m4 is now a copy of solaris2.ml.m4.
                The latter is kept around for backward compatibility.
        CONFIG: Allow ":D.S.N:" for mailer/virtusertable "error:" entries,
                where "D.S.N" is an RFC 1893 compliant error code.
        CONFIG: Use /usr/lbin as confEBINDIR for Compaq Tru64 (Digital UNIX).
        CONFIG: Remove second space between username and date in UNIX From_
                line.  Noted by Allan E Johannesen of Worcester Polytechnic
                Institute.
        CONFIG: Make sure all of the mailers have complete T= equates.
        CONFIG: Extend FEATURE(`local_procmail') so it can now take
                arguments overriding the mailer program, arguments, and
                mailer definition flags.  This makes it possible to use
                other programs such as maildrop for local delivery.
        CONFIG: Emit warning if FEATURE(`local_lmtp') or
                FEATURE(`local_procmail') is given after MAILER(`local').
                Patch from Richard A. Nelson of IBM.
        CONFIG: Add SMTP Authentication information to Received: header
                default value (confRECEIVED_HEADER).
        CONFIG: Remove `l' flag from USENET_MAILER_FLAGS as it is not a
                local mailer.  Problem noted by Per Hedeland of Ericsson.
        CONTRIB: Added bounce-resender.pl from Brian R. Gaeke of the
                University of California at Berkeley.
        CONTRIB: Added domainmap.m4 from Mark D. Roth of the University of
                Illinois at Urbana-Champaign.
        CONTRIB: etrn.pl now recognizes bogus host names.  Patch from
                Bruce Barnett of GE's R&D Lab.
        CONTRIB: Patches for re-mqueue.pl by Graeme Hewson of Oracle
                Corporation UK.
        CONTRIB: Added qtool.pl to assist in managing the queues.
        DEVTOOLS: Prevent user environment variables from interfering with
                the Build scripts.  Problem noted by Ezequiel H. Panepucci of
                Yale University.
        DEVTOOLS: 'Build -M' will display the obj.* directory which will
                be used for building.
        DEVTOOLS: 'Build -A' will display the architecture that would be
                used for a fresh build.
        DEVTOOLS: New variable confRANLIB, set automatically by configure.sh.
        DEVTOOLS: New variable confRANLIBOPTS for the options to send to
                ranlib.
        DEVTOOLS: 'Build -O <path>' will have the object files build in
                <path>/obj.*.  Suggested by Bryan Costales of Exactis.
        DEVTOOLS: New variable confNO_MAN_BUILD which will prevent the
                building of the man pages when defined.  Suggested by Bryan
                Costales.
        DEVTOOLS: New variables confNO_HELPFILE_INSTALL and
                confNO_STATISTICS_INSTALL which will prevent the
                installation of the sendmail helpfile and statistics file
                respectively.  Suggested by Bryan Costales.
        DEVTOOLS: Recognize ReliantUNIX as SINIX.  Patch from Gerald Rinske
                of Siemens Business Services.
        DEVTOOLS: New variable confSTDIO_TYPE which defines the type of
                stdio library.  The new buffered file I/O depends on the
                Torek stdio library.  This option can be either portable or
                torek.
        DEVTOOLS: New variables confSRCADD and confSMSRCADD which
                correspond to confOBJADD and confSMOBJADD respectively.
                They should contain the C source files for the object files
                listed in confOBJADD and confSMOBJADD.  These file names
                will be passed to the 'make depend' stage of compilation.
        DEVTOOLS: New program specific variables for each of the programs
                in the sendmail distribution.  Each has the form
                `conf_prog_ENVDEF', for example, `conf_sendmail_ENVDEF'.
                The new variables are conf_prog_ENVDEF, conf_prog_LIBS,
                conf_prog_SRCADD, and conf_prog_OBJADD.
        DEVTOOLS: Build system redesign.  This should have little affect on
                building the distribution, but documentation on the changes
                are in devtools/README.
        DEVTOOLS: Don't allow 'Build -f file' if an object directory already
                exists.  Suggested by Valdis Kletnieks of Virginia Tech.
        DEVTOOLS: Rename confSRCDIR to confSMSRCDIR since it only identifies
                the path to the sendmail source directory.  confSRCDIR is a
                new variable which identifies the root of the source
                directories for all of the programs in the distribution.
        DEVTOOLS: confSRCDIR and confSMSRCDIR are now determined at Build
                time.  They can both still be overridden by setting the m4
                macro.
        DEVTOOLS: confSBINGRP now defaults to bin instead of kmem.
        DEVTOOLS: 'Build -Q prefix' uses devtools/Site/prefix.*.m4 for
                build configurations, and places objects in obj.prefix.*/.
                Complains as 'Build -f file' does for existing object
                directories.  Suggested by Tom Smith of Digital Equipment
                Corporation.
        DEVTOOLS: Setting confINSTALL_RAWMAN will install unformatted
                manual pages in the directory tree specified by
                confMANROOTMAN.
        DEVTOOLS: If formatting the manual pages fails, copy in the
                preformatted pages from the distribution.  The new variable
                confCOPY specifies the copying program.
        DEVTOOLS: Defining confFORCE_RMAIL will install rmail without
                question.  Suggested by Terry Lambert of Whistle
                Communications.
        DEVTOOLS: confSTFILE and confHFFILE can be used to change the names
                of the installed statistics and help files, respectively.
        DEVTOOLS: Remove spaces in `uname -r` output when determining
                operating system identity.  Problem noted by Erik
                Wachtenheim of Dartmouth College.
        DEVTOOLS: New variable confLIBSEARCHPATH to specify the paths that
                will be search for the libraries specified in confLIBSEARCH.
                Defaults to "/lib /usr/lib /usr/shlib".
        DEVTOOLS: New variables confSTRIP and confSTRIPOPTS for specifying
                how to strip binaries.  These are used by the new
                install-strip target.
        DEVTOOLS: New config file site.post.m4 which is included after
                the others (if it exists).
        DEVTOOLS: Change order of LIBS: first product specific libraries
                then the default ones.
        MAIL.LOCAL: Will not be installed set-user-ID root.  To use mail.local
                as local delivery agent without LMTP mode, use
                MODIFY_MAILER_FLAGS(`LOCAL', `+S')
                to set the S flag.
        MAIL.LOCAL: Do not reject addresses which would otherwise be
                accepted by sendmail.  Suggested by Neil Rickert of
                Northern Illinois University.
        MAIL.LOCAL: New -7 option which causes LMTP mode not to advertise
                8BITMIME in the LHLO response.  Suggested by Kari Hurtta of
                the Finnish Meteorological Institute.
        MAIL.LOCAL: Add support for the maillock() routines by defining
                MAILLOCK when compiling.  Also requires linking with
                -lmail.  Patch from Neil Rickert of Northern Illinois
                University.
        MAIL.LOCAL: Create a Content-Length: header if CONTENTLENGTH is
                defined when compiling.  Automatically set for Solaris 2.3
                and later.  Patch from Neil Rickert of Northern Illinois
                University.
        MAIL.LOCAL: Move the initialization of the 'notifybiff' address
                structure to the beginning of the program.  This ensures that
                the getservbyname() is done before any seteuid to a possibly
                unauthenticated user.  If you are using NIS+ and secure RPC
                on a Solaris system, this avoids syslog messages such as,
                "authdes_refresh: keyserv(1m) is unable to encrypt session
                key."  Patch from Neil Rickert of Northern Illinois
                University.
        MAIL.LOCAL: Support group writable mail spool files when MAILGID is
                set to the gid to use (-DMAILGID=6) when compiling.
                Patch from Neil Rickert of Northern Illinois University.
        MAIL.LOCAL: When a mail message included lines longer than 2046
                characters (in LMTP mode), mail.local split the incoming
                line up into 2046-character output lines (excluding the
                newline).  If an input line was 2047 characters long
                (excluding CR-LF) and the last character was a '.',
                mail.local saw it as the end of input, transfered it to the
                user mailbox and tried to write an `ok' back to sendmail.
                If the message was much longer, both sendmail and
                mail.local would deadlock waiting for each other to read
                what they have written.  Problem noted by Peter Jeremy of
                Alcatel Australia Limited.
        MAIL.LOCAL: New option -b to return a permanent error instead of a
                temporary error if a mailbox exceeds quota.  Suggested by
                Neil Rickert of Northern Illinois University.
        MAIL.LOCAL: The creation of a lockfile is subject to a global
                timeout to avoid starvation.
        MAIL.LOCAL: Properly parse addresses with multiple quoted
                local-parts.  Problem noted by Ronald F. Guilmette of
                Infinite Monkeys & Co.
        MAIL.LOCAL: NCR MP/RAS 3.X portability from Tom J. Moore of NCR.
        MAILSTATS: New -p option to invoke program mode in which stats are
                printed in a machine readable fashion and the stats file
                is reset.  Patch from Kevin Hildebrand of the University
                of Maryland.
        MAKEMAP: If running as root, automatically change the ownership of
                generated maps to the TrustedUser as specified in the
                sendmail configuration file.
        MAKEMAP: New -C option to accept an alternate sendmail
                configuration file to use for finding the TrustedUser
                option.
        MAKEMAP: New -u option to dump (unmap) a database.  Based on
                code contributed by Roy Mongiovi of Georgia Tech.
        MAKEMAP: New -e option to allow empty values.  Suggested by Philip
                A. Prindeville of Enteka Enterprise Technology Services.
        MAKEMAP: Compile cleanly on 64-bit operating systems.  Problem
                noted by Gerald Rinske of Siemens Business Services.
        OP.ME: Correctly document interaction between F=S and U= mailer
                equates.  Problem noted by Bob Halley of Internet Engines.
        OP.ME: Fixup Timeout documentation.  From Graeme Hewson of Oracle
                Corporation UK.
        OP.ME: The Timeout [r] option was incorrectly listed as "safe"
                (e.g., sendmail would not drop root privileges if the
                option was specified on the command line).  Problem noted
                by Todd C. Miller of Courtesan Consulting.
        PRALIASES: Handle the hash and btree map specifications for
                Berkeley DB.  Patch from Brian J. Coan of the
                Institute for Global Communications.
        PRALIASES: Read the sendmail.cf file for the location(s) of the
                alias file(s) if the -f option is not used.  Patch from
                John Beck of Sun Microsystems.
        PRALIASES: New -C option to specify an alternate sendmail
                configuration file to use for finding alias file(s).  Patch
                from John Beck of Sun Microsystems.
        SMRSH: allow shell commands echo, exec, and exit.  Allow command
                lists using || and &&.  Based on patch from Brian J. Coan
                of the Institute for Global Communications.
        SMRSH: Update README for the new Build system.  From Tim Pierce
                of RootsWeb Genealogical Data Cooperative.
        VACATION: Added vacation auto-responder to sendmail distribution.
        LIBSMDB: Added abstracted database library.  Works with Berkeley
                DB 1.85, Berkeley DB 2.X, Berkeley DB 3.X, and NDBM.
        Changed Files:
                The Build script in the various program subdirectories are
                        no longer symbolic links.  They are now scripts
                        which execute the actual Build script in
                        devtools/bin.
                All the manual pages are now written against -man and not
                        -mandoc as they were previously.
                Add a simple Makefile to every directory so make instead
                        of Build will work (unless parameters are
                        required for Build).
        New Directories:
                devtools/M4/UNIX
                include
                libmilter
                libsmdb
                libsmutil
                vacation
        Renamed Directories:
                BuildTools => devtools
                src => sendmail
        Deleted Files:
                cf/m4/nullrelay.m4
                devtools/OS/Linux.ppc
                devtools/OS/ReliantUNIX
                devtools/OS/SINIX
                sendmail/ldap_map.h
        New Files:
                INSTALL
                PGPKEYS
                cf/cf/generic-linux.cf
                cf/cf/generic-linux.mc
                cf/feature/delay_checks.m4
                cf/feature/dnsbl.m4
                cf/feature/generics_entire_domain.m4
                cf/feature/no_default_msa.m4
                cf/feature/relay_mail_from.m4
                cf/feature/virtuser_entire_domain.m4
                cf/mailer/qpage.m4
                cf/ostype/bsdi.m4
                cf/ostype/hpux11.m4
                cf/ostype/openbsd.m4
                contrib/bounce-resender.pl
                contrib/domainmap.m4
                contrib/qtool.8
                contrib/qtool.pl
                devtools/M4/depend/AIX.m4
                devtools/M4/list.m4
                devtools/M4/string.m4
                devtools/M4/subst_ext.m4
                devtools/M4/switch.m4
                devtools/OS/Darwin
                devtools/OS/GNU
                devtools/OS/SINIX.5.43
                devtools/OS/SINIX.5.44
                devtools/OS/m88k
                devtools/bin/find_in_path.sh
                mail.local/Makefile
                mailstats/Makefile
                makemap/Makefile
                praliases/Makefile
                rmail/Makefile
                sendmail/Makefile
                sendmail/bf.h
                sendmail/bf_portable.c
                sendmail/bf_portable.h
                sendmail/bf_torek.c
                sendmail/bf_torek.h
                sendmail/shmticklib.c
                sendmail/statusd_shm.h
                sendmail/timers.c
                sendmail/timers.h
                smrsh/Makefile
                vacation/Makefile
        Renamed Files:
                cf/ostype/gnuhurd.m4 => cf/ostype/gnu.m4
                sendmail/cdefs.h => include/sendmail/cdefs.h
                sendmail/sendmail.hf => sendmail/helpfile
                sendmail/mailstats.h => include/sendmail/mailstats.h
                sendmail/pathnames.h => include/sendmail/pathnames.h
                sendmail/safefile.c => libsmutil/safefile.c
                sendmail/snprintf.c => libsmutil/snprintf.c
                sendmail/useful.h => include/sendmail/useful.h
                cf/ostype/solaris2.m4 => cf/ostype/solaris2.pre5.m4
        Copied Files:
                cf/ostype/solaris2.ml.m4 => cf/ostype/solaris2.m4

8.9.3/8.9.3     1999/02/04
        SECURITY: Limit message headers to a maximum of 32K bytes (total
                of all headers in a single message) to prevent a denial of
                service attack.  This limit will be configurable in 8.10.
                Problem noted by Michal Zalewski of the "Internet for
                Schools" project (IdS).
        Prevent segmentation fault on an LDAP lookup if the LDAP map
                was closed due to an earlier failure.  Problem noted by
                Jeff Wasilko of smoe.org.  Fix from Booker Bense of
                Stanford University and Per Hedeland of Ericsson.
        Preserve the order of the MIME headers in multipart messages
                when performing the MIME header length check.  This
                will allow PGP signatures to function properly.  Problem
                noted by Lars Hecking of University College, Cork, Ireland.
        If ruleset 5 rewrote the local address to an :include: directive,
                the delivery would fail with an "aliasing/forwarding loop
                broken" error.  Problem noted by Eric C Hagberg of Morgan
                Stanley.  Fix from Per Hedeland of Ericsson.
        Allow -T to work for bestmx maps.  Fix from Aaron Schrab of
                ExecPC Internet Systems.
        During the transfer of a message in an SMTP transaction, if a
                TCP timeout occurs, the message would be properly queued
                for later retry but the failure would be logged as
                "Illegal Seek" instead of a timeout.  Problem noted by
                Piotr Kucharski of the Warsaw School of Economics (SGH)
                and Carles Xavier Munyoz Baldo of CTV Internet.
        Prevent multiple deliveries on a self-referencing alias if the
                F=w mailer flag is not set.  Problem noted by Murray S.
                Kucherawy of Concentric Network Corporation and Per
                Hedeland of Ericsson.
        Do not strip empty headers but if there is no value and a
                default is defined in sendmail.cf, use the default.
                Problem noted by Philip Guenther of Gustavus Adolphus
                College and Christopher McCrory of Netus, Inc.
        Don't inherit information about the sender (notably the full name)
                in SMTP (-bs) mode, since this might be called from inetd.
        Accept any 3xx reply code in response to DATA command instead of
                requiring 354.  This change will match the wording to be
                published in the updated SMTP specification from the DRUMS
                group of the IETF.
        Portability:
                AIX 4.2.0 or 4.2.1 may become updated by the fileset
                        bos.rte.net level 4.2.0.2.  This introduces the
                        softlink /usr/lib/libbind.a which should
                        not be used.  It conflicts with the resolver
                        built into libc.a.  "bind" has been removed
                        from the confLIBSEARCH BuildTools variable.
                        Users who have installed BIND 8.X will have
                        to add it back in their site.config.m4 file.
                        Problem noted by Ole Holm Nielsen of the
                        Technical University of Denmark.
                CRAY TS 10.0.x from Sven Nielsen of San Diego
                        Supercomputer Center.
                Improved LDAP version 3 integration based on input
                        from Kurt D. Zeilenga of the OpenLDAP Foundation,
                        John Beck of Sun Microsystems, and Booker Bense
                        of Stanford University.
                Linux doesn't have a standard way to get the timezone
                        between different releases.  Back out the
                        change in 8.9.2 and don't attempt to derive
                        a timezone.  Problem reported by Igor S. Livshits
                        of the University of Illinois at Urbana-Champaign
                        and Michael Dickens of Tetranet Communications.
                Reliant UNIX, the new name for SINIX, from Gert-Jan Looy
                        of Siemens/SNI.
                SunOS 5.8 from John Beck of Sun Microsystems.
        CONFIG: SCO UnixWare 2.1 and 7.0 need TZ to get the proper
                timezone.  Problem noted by Petr Lampa of Technical
                University of Brno.
        CONFIG: Handle <@bestmx-host:user@otherhost> addressing properly
                when using FEATURE(bestmx_is_local).  Patch from Neil W.
                Rickert of Northern Illinois University.
        CONFIG: Properly handle source routed and %-hack addresses on
                hosts which the mailertable remaps to local:.  Patch from
                Neil W. Rickert of Northern Illinois University.
        CONFIG: Internal fixup of mailertable local: map value.  Patch from
                Larry Parmelee of Cornell University.
        CONFIG: Only add back +detail from host portion of mailer triplet
                on local mailer triplets if it was originally +detail.
                Patch from Neil W. Rickert of Northern Illinois University.
        CONFIG: The bestmx_is_local checking done in check_rcpt would
                cause later checks to fail.  Patch from Paul J Murphy of
                MIDS Europe.
        New Files:
                BuildTools/OS/CRAYTS.10.0.x
                BuildTools/OS/ReliantUNIX
                BuildTools/OS/SunOS.5.8

8.9.2/8.9.2     1998/12/30
        SECURITY: Remove five second sleep on accepting daemon connections
                due to an accept() failure.  This sleep could be used
                for a denial of service attack.
        Do not silently ignore queue files with names which are too long.
                Patch from Bryan Costales of InfoBeat, Inc.
        Do not store failures closing an SMTP session in persistent
                host status.  Reported by Graeme Hewson of Oracle
                Corporation UK.
        Allow symbolic link forward files if they are in safe directories.
                Problem noted by Andreas Schott of the Max Planck Society.
        Missing columns in a text map could cause a segmentation fault.
                Fix from David Lee of the University of Durham.
        Note that for 8.9.X, PrivacyOptions=goaway also includes the
                noetrn flag.  This is scheduled to change in a future
                version of sendmail.  Problem noted by Theo Van Dinter of
                Chrysalis Symbolic Designa and Alan Brown of Manawatu
                Internet Services.
        When trying to do host canonification in a Wildcard MX
                environment, try an MX lookup of the hostname without the
                default domain appended.  Problem noted by Olaf Seibert of
                Polderland Language & Speech Technology.
        Reject SMTP RCPT To: commands with only comments (i.e.
                'RCPT TO: (comment)'.  Problem noted by Earle Ake of
                Hassler Communication Systems Technology, Inc.
        Handle any number of %s in the LDAP filter spec.  Patch from
                Per Hedeland of Ericsson.
        Clear ldapx open timeouts even if the map open failed to prevent
                a segmentation fault.  Patch from Wayne Knowles of the
                National Institute of Water & Atmospheric Research Ltd.
        Do not syslog envelope clone messages when using address
                verification (-bv).  Problem noted by Kari Hurtta of the
                Finnish Meteorological Institute.
        Continue to perform queue runs while in daemon mode even if the
                daemon is rejecting connections due to a disk full
                condition.  Problem noted by JR Oldroyd of TerraNet
                Internet Services.
        Include full filename on installation of the sendmail.hf file
                in case the $HFDIR directory does not exist.  Problem
                noted by Josef Svitak of Montana State University.
        Close all maps when exiting the process with one exception.
                Berkeley DB can use internal shared memory locking for
                its memory pool.  Closing a map opened by another process
                will interfere with the shared memory and locks of the
                parent process leaving things in a bad state.  For
                Berkeley DB, only close the map if the current process
                is also the one that opened the map, otherwise only close
                the map file descriptor.  Thanks to Yoseff Francus of
                Collective Technologies for volunteering his system for
                extended testing.
        Avoid null pointer dereference on XDEBUG output for SMTP reply
                failures.  Problem noted by Carlos Canau of EUnet Portugal.
        On mailq and hoststat listings being piped to another program, such
                as more, if the pipe closes (i.e., the user quits more),
                stop sending output and exit.  Patch from Allan E Johannesen
                of Worcester Polytechnic Institute.
        In accordance with the documentation, LDAP map lookup failures
                are now considered temporary failures instead of permanent
                failures unless the -t flag is used in the map definition.
                Problem noted by Booker Bense of Stanford University and
                Eric C. Hagberg of Morgan Stanley.
        Fix by one error reporting on long alias names.  Problem noted by
                H. Paul Hammann of the Missouri Research and Education
                Network.
        Fix DontBlameSendmail=IncludeFileInUnsafeDirPath behavior.  Problem
                noted by Barry S. Finkel of Argonne National Laboratory.
        When automatically converting from 8 bit to quoted printable MIME,
                be careful not to miss a multi-part boundary if that
                boundary is preceded by a boundary-like line.  Problem
                noted by Andreas Raschle of Ansid Inc.  Fix from
                Kari Hurtta of the Finnish Meteorological Institute.
        Avoid bogus reporting of "LMTP tobuf overflow" when the buffer
                has enough space for the additional address.  Problem
                noted by Steve Cliffe of the University of Wollongong.
        Fix DontBlameSendmail=FileDeliveryToSymlink behavior.  Problem
                noted by Alex Vorobiev of Swarthmore College.
        If the check_compat ruleset resolves to the $#discard mailer,
                discard the current recipient.  Unlike check_relay,
                check_mail, and check_rcpt, the entire envelope is not
                discarded.  Problem noted by RZ D. Rahlfs.  Fix from
                Claus Assmann of Christian-Albrechts-University of Kiel.
        Avoid segmentation fault when reading ServiceSwitchFile files with
                bogus formatting.  Patch from Kari Hurtta of the Finnish
                Meteorological Institute.
        Support Berkeley DB 2.6.4 API change.
        OP.ME: Pages weren't properly output on duplexed printers.  Fix
                from Matthew Black of CSU Long Beach.
        Portability:
                Apple Rhapsody from Wilfredo Sanchez of Apple Computer, Inc.
                Avoid a clash with IRIX 6.2 getopt.h and the UserDatabase
                        option structure.  Problem noted by Ashley M.
                        Kirchner of Photo Craft Laboratories, Inc.
                Break out IP address to hostname translation for
                        reading network interface addresses into
                        class 'w'.  Patch from John Kennedy of
                        Cal State University, Chico.
                AIX 4.x use -qstrict with -O3 to prevent the optimized
                        from changing the semantics of the compiled
                        program.  From Simon Travaglia of the
                        University of Waikato, New Zealand.
                FreeBSD 2.2.2 and later support setusercontext().  From
                        Peter Wemm of DIALix.
                FreeBSD 3.x fix from Peter Wemm of DIALix.
                IRIX 5.x has a syslog buffer size of 512 bytes.  From
                        Nao NINOMIYA of Utsunomiya University.
                IRIX 6.5 64-bit Build support.
                LDAP Version 3 support from John Beck and Ravi Iyer
                        of Sun Microsystems.
                Linux does not implement seteuid() properly.  From
                        John Kennedy of Cal State University, Chico.
                Linux timezone type was set improperly.  From Takeshi Itoh
                        of Bits Co., Ltd.
                NCR MP-RAS 3.x needs -lresolv for confLIBS.  From
                        Tom J. Moore of NCR.
                NeXT 4.x correction to man page path.  From J. P. McCann
                        of E I A.
                System V Rel 5.x (a.k.a UnixWare7 w/o BSD-Compatibility Libs)
                        from Paul Gampe of the Asia Pacific Network
                        Information Center.
                ULTRIX now requires an optimization limit of 970 from
                        Allan E Johannesen of Worcester Polytechnic
                        Institute.
                Fix extern declaration for sm_dopr().  Fix from Henk
                        van Oers of Algemeen Nederlands Persbureau.
        CONFIG: Catch @hostname,user@anotherhost.domain as relaying.
                Problem noted by Mark Rogov of AirMedia, Inc.  Fix from
                Claus Assmann of Christian-Albrechts-University of Kiel.
        CONFIG: Do not refer to http://maps.vix.com/ on RBL rejections as
                there are multiple RBL's available and the MAPS RBL may
                not be the one in use.  Suggested by Alan Brown of
                Manawatu Internet Services.
        CONFIG: Properly strip route addresses (i.e., @host1:user@host2)
                when stripping down a recipient address to check for
                relaying.  Patch from Claus Assmann of
                Christian-Albrechts-University of Kiel and Neil W Rickert
                of Northern Illinois University.
        CONFIG: Allow the access database to override RBL lookups.  Patch
                from Claus Assmann of Christian-Albrechts-University of
                Kiel.
        CONFIG: UnixWare 7 support from Phillip P. Porch of The Porch
                Dot Com.
        CONFIG: Fixed check for deferred delivery mode warning.  Patch
                from Claus Assmann of Christian-Albrechts-University of
                Kiel and Per Hedeland of Ericsson.
        CONFIG: If a recipient using % addressing is used, e.g.
                user%site@othersite, and othersite's MX records are now
                checked for local hosts if FEATURE(relay_based_on_MX) is
                used.  Problem noted by Alexander Litvin of Lucky Net Ltd.
                Patch from Alexander Litvin of Lucky Net Ltd and
                Claus Assmann of Christian-Albrechts-University of Kiel.
        MAIL.LOCAL: Prevent warning messages from appearing in the LMTP
                stream.  Do not allow more than one response per recipient.
        MAIL.LOCAL: Handle routed addresses properly when using LMTP.  Fix
                from John Beck of Sun Microsystems.
        MAIL.LOCAL: Properly check for CRLF when using LMTP.  Fix from
                John Beck of Sun Microsystems.
        MAIL.LOCAL: Substitute MAILER-DAEMON for the LMTP empty sender in
                the envelope From header.
        MAIL.LOCAL: Accept underscores in hostnames in LMTP mode.
                Problem noted by Glenn A. Malling of Syracuse University.
        MAILSTATS: Document msgsrej and msgsdis fields in the man page.
                Problem noted by Richard Wong of Princeton University.
        MAKEMAP: Build group list so group writable files are allowed with
                the -s flag.  Problem noted by Curt Sampson of Internet
                Portal Services, Inc.
        PRALIASES: Automatically handle alias files created without the
                NULL byte at the end of the key.  Patch from John Beck of
                Sun Microsystems.
        PRALIASES: Support Berkeley DB 2.6.4 API change.
        New Files:
                BuildTools/OS/IRIX64.6.5
                BuildTools/OS/UnixWare.5.i386
                cf/ostype/unixware7.m4
                contrib/smcontrol.pl
                src/control.c

8.9.1/8.9.1     1998/07/02
        If both an OS specific site configuration file and a generic
                site.config.m4 file existed, only the latter was used
                instead of both.  Problem noted by Geir Johannessen of
                the Norwegian University of Science and Technology.
        Fix segmentation fault while converting 8 bit to 7 bit MIME
                multipart messages by trying to write to an unopened
                file descriptor.  Fix from Kari Hurtta of the Finnish
                Meteorological Institute.
        Do not assume Message: and Text: headers indicate the end of
                the header area when parsing MIME headers.  Problem noted
                by Kari Hurtta of the Finnish Meteorological Institute.
        Setting the confMAN#SRC Build variable would only effect the
                installation commands.  The man pages would still be
                built with .0 extensions.  Problem noted by Bryan
                Costales of InfoBeat, Inc.
        Installation of manual pages didn't honor the DESTDIR environment
                variable.  Problem noted by Bryan Costales of InfoBeat, Inc.
        If the check_relay ruleset resolved to the discard mailer, messages
                were still delivered.  Problem noted by Mirek Luc of NASK.
        Mail delivery to files would fail with an Operating System Error
                if sendmail was not running as root, i.e., RunAsUser was set.
                Problem noted by Leonard N. Zubkoff of Dandelion Digital.
        Prevent MinQueueAge from interfering from queued items created
                in the future, i.e., if the system clock was set ahead
                and then back.  Problem noted by Michael Miller of the
                University of Natal, Pietermaritzburg.
        Do not advertise ETRN support in ESTMP EHLO reply if noetrn is
                set in the PrivacyOptions option.  Fix from Ted Rule of
                Flextech TV.
        Log invalid persistent host status file lines instead of
                bouncing the message.  Problem noted by David Lindes of
                DaveLtd Enterprises.
        Move creation of empty sendmail.st file from installation to
                compilation.  Installation may be done from a read-only
                mount.  Fix from Bryan Costales of InfoBeat, Inc. and Ric
                Anderson of the Oasis Research Center, Inc.
        Enforce the maximum number of User Database entries limit.  Problem
                noted by Gary Buchanan of Credence Systems Inc.
        Allow dead.letter files in root's home directory.  Problem noted
                by Anna Ullman of Sun Microsystems.
        Program deliveries in forward files could be marked unsafe if
                any directory listed in the ForwardPath option did not
                exist.  Problem noted by Jorg Bielak of Coastal Web Online.
        Do not trust the length of the address structure returned by
                gethostbyname().  Problem noted by Chris Evans of Oxford
                University.
        If the SIZE= MAIL From: ESMTP parameter is too large, use the
                5.3.4 DSN status code instead of 5.2.2.  Similarly, for
                non-local deliveries, if the message is larger than the
                mailer maximum message size, use 5.3.4 instead of 5.2.3.
                Suggested by Antony Bowesman of
                Fujitsu/TeaWARE Mail/MIME System.
        Portability:
                Fix the check for an IP address reverse lookup for
                        use in $&{client_name} on 64 bit platforms.
                        From Gilles Gallot of Institut for Development
                        and Resources in Intensive Scientific computing.
                BSD-OS uses .0 for man page extensions.  From Jeff Polk
                        of BSDI.
                DomainOS detection for Build.  Also, version 10.4 and later
                        ship a unistd.h.  Fixes from Takanobu Ishimura of
                        PICT Inc.
                NeXT 4.x uses /usr/lib/man/cat for its man pages.  From
                        J. P. McCann of E I A.
                SCO 4.X and 5.X include NDBM support.  From Vlado Potisk
                        of TEMPEST, Ltd.
        CONFIG: Do not pass spoofed PTR results through resolver for
                qualification.  Problem noted by Michiel Boland of
                Digital Valley Internet Professionals; fix from
                Kari Hurtta of the Finnish Meteorological Institute.
        CONFIG: Do not try to resolve non-DNS hostnames such as UUCP,
                BITNET, and DECNET addresses for resolvable senders.
                Problem noted by Alexander Litvin of Lucky Net Ltd.
        CONFIG: Work around Sun's broken configuration which sends bounce
                messages as coming from @@hostname instead of <>.  LMTP
                would not accept @@hostname.
        OP.ME: Corrections to complex sendmail startup script from Rick
                Troxel of the National Institutes of Health.
        RMAIL: Do not install rmail by default, require 'make force-install'
                as this rmail isn't the same as others.  Suggested by
                Kari Hurtta of the Finnish Meteorological Institute.
        New Files:
                BuildTools/OS/DomainOS.10.4

8.9.0/8.9.0     1998/05/19
        SECURITY: To prevent users from reading files not normally
                readable, sendmail will no longer open forward, :include:,
                class, ErrorHeader, or HelpFile files located in unsafe
                (i.e., group or world writable) directory paths.  Sites
                which need the ability to override security can use the
                DontBlameSendmail option.  See the README file for more
                information.
        SECURITY: Problems can occur on poorly managed systems, specifically,
                if maps or alias files are in world writable directories.
                This fixes the change added to 8.8.6 to prevent links in these
                world writable directories.
        SECURITY: Make sure ServiceSwitchFile option file is not a link if
                it is in a world writable directory.
        SECURITY: Never pass a tty to a mailer -- if a mailer can get at the
                tty it may be able to push bytes back to the senders input.
                Unfortunately this breaks -v mode.  Problem noted by
                Wietse Venema of the Global Security Analysis Lab at
                IBM T.J. Watson Research.
        SECURITY: Empty group list if DontInitGroups is set to true to
                prevent program deliveries from picking up extra group
                privileges.  Problem reported by Wolfgang Ley of DFN-CERT.
        SECURITY: The default value for DefaultUser is now set to the uid and
                gid of the first existing user mailnull, sendmail, or daemon
                that has a non-zero uid.  If none of these exist, sendmail
                reverts back to the old behavior of using uid 1 and gid 1.
                This is a security problem for Linux which has chosen that
                uid and gid for user bin instead of daemon.  If DefaultUser
                is set in the configuration file, that value overrides this
                default.
        SECURITY: Since 8.8.7, the check for non-set-user-ID binaries
                interfered with setting an alternate group id for the
                RunAsUser option.  Problem noted by Randall Winchester of
                the University of Maryland.
        Add support for Berkeley DB 2.X.  Based on patch from John Kennedy
                of Cal State University, Chico.
        Remove support for OLD_NEWDB (pre-1.5 version of Berkeley DB).  Users
                which previously defined OLD_NEWDB=1 must now upgrade to the
                current version of Berkeley DB.
        Added support for regular expressions using the new map class regex.
                From Jan Krueger of Unix-AG of University of Hannover.
        Support for BIND 8.1.1's hesiod for hesiod maps and hesiod
                UserDatabases from Randall Winchester of the University
                of Maryland.
        Allow any shell for user shell on program deliveries on V1
                configurations for backwards compatibility on machines which
                do not have getusershell().  Fix from John Beck of Sun
                Microsystems.
        On operating systems which change the process title by reusing the
                argument vector memory, sendmail could corrupt memory if the
                last argument was either "-q" or "-d".  Problem noted by
                Frank Langbein of the University of Stuttgart.
        Support Local Mail Transfer Protocol (LMTP) between sendmail and
                mail.local on the F=z flag.
        Macro-expand the contents of the ErrMsgFile.  Previously this was
                only done if you had magic characters (0x81) to indicate
                macro expansion.  Now $x will be expanded.  This means that
                real dollar signs have to be backslash escaped.
        TCP Wrappers expects "unknown" in the hostname argument if the
                reverse DNS lookup for the incoming connection fails.
                Problem noted by Randy Grimshaw of Syracuse University and
                Wietse Venema of the Global Security Analysis Lab at
                IBM T.J. Watson Research.
        DSN success bounces generated from an invocation of sendmail -t
                would be sent to both the sender and MAILER-DAEMON.
                Problem noted by Claus Assmann of
                Christian-Albrechts-University of Kiel.
        Avoid "Error 0" messages on delivery mailers which exit with a
                valid exit value such as EX_NOPERM.  Fix from Andreas Luik
                of ISA Informationssysteme GmbH.
        Tokenize $&x expansions on right hand side of rules.  This eliminates
                the need to use tricks like $(dequote "" $&{client_name} $)
                to cause the ${client_name} macro to be properly tokenized.
        Add the MaxRecipientsPerMessage option: this limits the number of
                recipients that will be accepted in a single SMTP
                transaction.  After this number is reached, sendmail
                starts returning "452 Too many recipients" to all RCPT
                commands.  This can be used to limit the number of recipients
                per envelope (in particular, to discourage use of the server
                for spamming).  Note: a better approach is to restrict
                relaying entirely.
        Fixed pointer initialization for LDAP lmap struct, fixed -s option
                to ldapx map and added timeout for ldap_open call to
                avoid hanging sendmail in the event of hung LDAP servers.
                Patch from Booker Bense of Stanford University.
        Allow multiple -qI, -qR, or -qS queue run limiters.  For example,
                '-qRfoo -qRbar' would deliver mail to recipients with foo or
                bar in their address.  Patch from Allan E Johannesen of
                Worcester Polytechnic Institute.
        The bestmx map will now return a list of the MX servers for a host if
                passed a column delimiter via the -z map flag.  This can be
                used to check if the server is an MX server for the recipient
                of a message.  This can be used to help prevent relaying.
                Patch from Mitchell Blank Jr of Exec-PC.
        Mark failures for the *file* mailer and return bounce messages to the
                sender for those failures.
        Prevent bogus syslog timestamps on errors in sendmail.cf by
                preserving the TZ environment variable until TimeZoneSpec
                has been determined.  Problem noted by Ralf Hildebrandt of
                Technical University of Braunschweig.  Patch from Per Hedeland
                of Ericsson.
        Print test input in address test mode when input is not from the tty
                when the -v flag is given (i.e., sendmail -bt -v) to make
                output easier to decipher.  Problem noted by Aidan Nichol
                of Procter & Gamble.
        The LDAP map -s flag was not properly parsed and the error message
                given included the remainder of the arguments instead of
                solely the argument in error.  Problem noted by Aidan Nichol
                of Procter & Gamble.
        New DontBlameSendmail option.  This option allows administrators to
                bypass some of sendmail's file security checks at the expense
                of system security.  This should only be used if you are
                absolutely sure you know the consequences.  The available
                DontBlameSendmail options are:
                        Safe
                        AssumeSafeChown
                        ClassFileInUnsafeDirPath
                        ErrorHeaderInUnsafeDirPath
                        GroupWritableDirPathSafe
                        GroupWritableForwardFileSafe
                        GroupWritableIncludeFileSafe
                        GroupWritableAliasFile
                        HelpFileinUnsafeDirPath
                        WorldWritableAliasFile
                        ForwardFileInGroupWritableDirPath
                        IncludeFileInGroupWritableDirPath
                        ForwardFileInUnsafeDirPath
                        IncludeFileInUnsafeDirPath
                        ForwardFileInUnsafeDirPathSafe
                        IncludeFileInUnsafeDirPathSafe
                        MapInUnsafeDirPath
                        LinkedAliasFileInWritableDir
                        LinkedClassFileInWritableDir
                        LinkedForwardFileInWritableDir
                        LinkedIncludeFileInWritableDir
                        LinkedMapInWritableDir
                        LinkedServiceSwitchFileInWritableDir
                        FileDeliveryToHardLink
                        FileDeliveryToSymLink
                        WriteMapToHardLink
                        WriteMapToSymLink
                        WriteStatsToHardLink
                        WriteStatsToSymLink
                        RunProgramInUnsafeDirPath
                        RunWritableProgram
        New DontProbeInterfaces option to turn off the inclusion of all the
                interface names in $=w on startup.  In particular, if you
                have lots of virtual interfaces, this option will speed up
                startup.  However, unless you make other arrangements, mail
                sent to those addresses will be bounced.
        Automatically create alias databases if they don't exist and
                AutoRebuildAliases is set.
        Add PrivacyOptions=noetrn flag to disable the SMTP ETRN command.
                Suggested by Christophe Wolfhugel of the Institut Pasteur.
        Add PrivacyOptions=noverb flag to disable the SMTP VERB command.
        When determining the client host name ($&{client_name} macro), do
                a forward (A) DNS lookup on the result of the PTR lookup
                and compare results.  If they differ or if the PTR lookup
                fails, &{client_name} will contain the IP address
                surrounded by square brackets (e.g., [127.0.0.1]).
        New map flag: -Tx appends "x" to lookups that return temporary failure
                (i.e, it is like -ax for the temporary failure case, in
                contrast to the success case).
        New syntax to do limited checking of header syntax.  A config line
                of the form:
                        HHeader: $>Ruleset
                causes the indicated Ruleset to be invoked on the Header
                when read.  This ruleset works like the check_* rulesets --
                that is, it can reject mail on the basis of the contents.
        Limit the size of the HELO/EHLO parameter to prevent spammers
                from hiding their connection information in Received:
                headers.
        When SingleThreadDelivery is active, deliveries to locked hosts
                are skipped.  This will cause the delivering process to
                try the next MX host or queue the message if no other MX
                hosts are available.  Suggested by Alexander Litvin.
        The [FILE] mailer type now delivers to the file specified in the
                A= equate of the mailer definition instead of $u.  It also
                obeys all of the F= mailer flags such as the MIME
                7/8 bit conversion flags.  This is useful for defining
                a mailer which delivers to the same file regardless of the
                recipient (e.g., 'A=FILE /dev/null' to discard unwanted mail).
        Do not assume the identity of a remote connection is root@localhost
                if the remote connection closes the socket before the
                remote identity can be queried.
        Change semantics of the F=S mailer flag back to 8.7.5 behavior.
                Some mailers, including procmail, require that the real
                uid is left unchanged by sendmail.  Problem noted by Per
                Hedeland of Ericsson.
        No longer is the src/obj*/Makefile selected from a large list -- it
                is now generated using the information in BuildTools/OS/ --
                some of the details are determined dynamically via
                BuildTools/bin/configure.sh.
        The other programs in the sendmail distribution -- mail.local,
                mailstats, makemap, praliases, rmail, and smrsh -- now use
                the new Build method which creates an operating system
                specific Makefile using the information in BuildTools.
        Make 4xx reply codes to the SMTP MAIL command be non-sticky (i.e.,
                a failure on one message won't affect future messages to the
                same host).  This is necessary if the remote host sends
                a 451 error if the domain of the sender does not resolve
                as is common in anti-spam configurations.  Problem noted
                by Mitchell Blank Jr of Exec-PC.
        New "discard" mailer for check_* rulesets and header checking
                rulesets.  If one of the above rulesets resolves to the
                $#discard mailer, the commands will be accepted but the
                message will be completely discarded after it is accepting.
                This means that even if only one of the recipients
                resolves to the $#discard mailer, none of the recipients
                will receive the mail.  Suggested by Brian Kantor.
        All but the last cloned envelope of a split envelope were queued
                instead of being delivered.  Problem noted by John Caruso
                of CNET: The Computer Network.
        Fix deadlock situation in persistent host status file locking.
        Syslog an error if a user forward file could not be read due to
                an error.  Patch from John Beck of Sun Microsystems.
        Use the first name returned on machine lookups when canonifying a
                hostname via NetInfo.  Patch from Timm Wetzel of GWDG.
        Clear the $&{client_addr}, $&{client_name}, and $&{client_port}
                macros when delivering a bounce message to prevent
                rejection by a check_compat ruleset which uses these macros.
                Problem noted by Jens Hamisch of AgiX Internetservices GmbH.
        If the check_relay ruleset resolves to the the error mailer, the
                error in the $: portion of the resolved triplet is used
                in the rejection message given to the remote machine.
                Suggested by Scott Gifford of The Internet Ramp.
        Set the $&{client_addr}, $&{client_name}, and $&{client_port} macros
                before calling the check_relay ruleset.  Suggested by Scott
                Gifford of The Internet Ramp.
        Sendmail would get a segmentation fault if a mailer exited with an
                exit code of 79.  Problem noted by Aaron Schrab of ExecPC
                Internet.  Fix from Christophe Wolfhugel of the Pasteur
                Institute.
        Separate snprintf/vsnprintf routines into separate file for use by
                mail.local.
        Allow multiple map lookups on right hand side, e.g.,
                R$*     $( host $1 $) $| $( passwd $1 $).  Patch from
                Christophe Wolfhugel of the Pasteur Institute.
        Properly generate success DSN messages if requested for aliases
                which have owner- aliases.  Problem noted by Kari Hurtta
                of the Finnish Meteorological Institute.
        Properly display delayed-expansion macros ($&{macroname}) in
                address test mode (-bt).  Problem noted by Bryan Costales
                of InfoBeat, Inc.
        -qR could sometimes match names incorrectly.  Problem noted by
                Lutz Euler of Lavielle EDV Systemberatung GmbH & Co.
        Include a magic number and version in the StatusFile for the
                mailstats command.
        Record the number of rejected and discarded messages in the
                StatusFile for display by the mailstats command.  Patch
                from Randall Winchester of the University of Maryland.
        IDENT returns where the OSTYPE field equals "OTHER" now list the
                user portion as IDENT:username@site instead of
                username@site to differentiate the two.  Suggested by
                Kari Hurtta of the Finnish Meteorological Institute.
        Enforce timeout for LDAP queries.  Patch from Per Hedeland of
                Ericsson.
        Change persistent host status filename substitution so '/' is
                replaced by ':' instead of '|' to avoid clashes.  Also
                avoid clashes with hostnames with leading dots.  Fix from
                Mitchell Blank Jr. of Exec-PC.
        If the system lock table is full, only attempt to create a new
                queue entry five times before giving up.  Previously, it
                was attempted indefinitely which could cause the partition
                to run out of inodes.  Problem noted by Suzie Weigand of
                Stratus Computer, Inc.
        In verbose mode, warn if the sendmail.cf version is less than the
                currently supported version.
        Sorting for QueueSortOrder=host is now case insensitive.  Patch
                from Randall S. Winchester of the University of Maryland.
        Properly quote a full name passed via the -F command line option,
                the Full-Name: header, or the NAME environment variable if
                it contains characters which must be quoted.  Problem noted
                by Kari Hurtta of the Finnish Meteorological Institute.
        Avoid possible race condition that unlocked a mail job before
                releasing the transcript file on systems that use flock(2).
                In some cases, this might result in a "Transcript Unavailable"
                message in error bounces.
        Accept SMTP replies which contain only a reply code and no
                accompanying text.  Problem noted by Fernando Fraticelli of
                Digital Equipment Corporation.
        Portability:
                AIX 4.1 uses int for SOCKADDR_LEN_T from Motonori Nakamura
                        of Kyoto University.
                AIX 4.2 requires <userpw.h> before <usersec.h>.  Patch from
                        Randall S. Winchester of the University of
                        Maryland.
                AIX 4.3 from Valdis Kletnieks of Virginia Tech CNS.
                CRAY T3E from Manu Mahonen of Center for Scientific Computing
                        in Finland.
                Digital UNIX now uses statvfs for determining free
                        disk space.  Patch from Randall S. Winchester of
                        the University of Maryland.
                HP-UX 11.x from Richard Allen of Opin Kerfi HF and
                        Regis McEwen of Progress Software Corporation.
                IRIX 64 bit fixes from Kari Hurtta of the Finnish
                        Meteorological Institute.
                IRIX 6.2 configuration fix for mail.local from Michael Kyle
                        of CIC/Advanced Computing Laboratory.
                IRIX 6.5 from Thomas H Jones II of SGI.
                IRIX 6.X load average code from Bob Mende of SGI.
                QNX from Glen McCready <glen@qnx.com>.
                SCO 4.2 and 5.x use /usr/bin instead of /usr/ucb for links
                        to sendmail.  Install with group bin instead of kmem
                        as kmem does not exist.  From Guillermo Freige of
                        Gobernacion de la Pcia de Buenos Aires and Paul
                        Fischer of BTG, Inc.
                SunOS 4.X does not include memmove().  Patch from
                        Per Hedeland of Ericsson.
                SunOS 5.7 includes getloadavg() function for determining
                        load average.  Patch from John Beck of Sun
                        Microsystems.
        CONFIG: Increment version number of config file.
        CONFIG: add DATABASE_MAP_TYPE to set the default type of database
                map for the various maps.  The default is hash.  Patch from
                Robert Harker of Harker Systems.
        CONFIG: new confEBINDIR m4 variable for defining the executable
                directory for certain programs.
        CONFIG: new FEATURE(local_lmtp) to use the new LMTP support for
                local mail delivery.  By the default, /usr/libexec/mail.local
                is used.  This is expected to be the mail.local shipped
                with 8.9 which is LMTP capable.  The path is based on the
                new confEBINDIR m4 variable.
        CONFIG: Use confEBINDIR in determining path to smrsh for
                FEATURE(smrsh).  Note that this changes the default from
                /usr/local/etc/smrsh to /usr/libexec/smrsh.  To obtain the
                old path for smrsh, use FEATURE(smrsh, /usr/local/etc/smrsh).
        CONFIG: DOMAIN(generic) changes the default confFORWARD_PATH to
                include $z/.forward.$w+$h and $z/.forward+$h which allow
                the user to setup different .forward files for
                user+detail addressing.
        CONFIG: add confMAX_RCPTS_PER_MESSAGE, confDONT_PROBE_INTERFACES,
                and confDONT_BLAME_SENDMAIL to set MaxRecipientsPerMessage,
                DontProbeInterfaces, and DontBlameSendmail options.
        CONFIG: by default do not allow relaying (that is, accepting mail
                from outside your domain and sending it to another host
                outside your domain).
        CONFIG: new FEATURE(promiscuous_relay) to allow mail relaying from
                any site to any site.
        CONFIG: new FEATURE(relay_entire_domain) allows any host in your
                domain as defined by the 'm' class ($=m) to relay.
        CONFIG: new FEATURE(relay_based_on_MX) to allow relaying based on
                the MX records of the host portion of an incoming recipient.
        CONFIG: new FEATURE(access_db) which turns on the access database
                feature.  This database gives you the ability to allow
                or refuse to accept mail from specified domains for
                administrative reasons.  By default, names that are listed
                as "OK" in the access db are domain names, not host names.
        CONFIG: new confCR_FILE m4 variable for defining the name of the file
                used for class 'R'.  Defaults to /etc/mail/relay-domains.
        CONFIG: new command RELAY_DOMAIN(domain) and RELAY_DOMAIN_FILE(file)
                to add items to class 'R' ($=R) for hosts allowed to relay.
        CONFIG: new FEATURE(relay_hosts_only) to change the behavior
                of FEATURE(access_db) and class 'R' to lookup individual
                host names only.
        CONFIG: new FEATURE(loose_relay_check).  Normally, if a recipient
                using % addressing is used, e.g.  user%site@othersite,
                and othersite is in class 'R', the check_rcpt ruleset
                will strip @othersite and recheck user@site for relaying.
                This feature changes that behavior.  It should not be
                needed for most installations.
        CONFIG: new FEATURE(relay_local_from) to allow relaying if the
                domain portion of the mail sender is a local host.  This
                should only be used if absolutely necessary as it opens
                a window for spammers.  Patch from Randall S. Winchester of
                the University of Maryland.
        CONFIG: new FEATURE(blacklist_recipients) turns on the ability to
                block incoming mail destined for certain recipient
                usernames, hostnames, or addresses.
        CONFIG: By default, MAIL FROM: commands in the SMTP session will be
                refused if the host part of the argument to MAIL FROM: cannot
                be located in the host name service (e.g., DNS).
        CONFIG: new FEATURE(accept_unresolvable_domains) accepts
                unresolvable hostnames in MAIL FROM: SMTP commands.
        CONFIG: new FEATURE(accept_unqualified_senders) accepts
                MAIL FROM: senders which do not include a domain.
        CONFIG: new FEATURE(rbl) Turns on rejection of hosts found in the
                Realtime Blackhole List.  You can specify the RBL name
                server to contact by specifying it as an optional argument.
                The default is rbl.maps.vix.com.  For details, see
                http://maps.vix.com/rbl/.
        CONFIG: Call Local_check_relay, Local_check_mail, and
                Local_check_rcpt from check_relay, check_mail, and
                check_rcpt.  Users with local rulesets should place the
                rules using LOCAL_RULESETS.  If a Local_check_* ruleset
                returns $#OK, the message is accepted.  If the ruleset
                returns a mailer, the appropriate action is taken, else
                the return of the ruleset is ignored.
        CONFIG: CYRUS_MAILER_FLAGS now includes the /:| mailer flags by
                default to support file, :include:, and program deliveries.
        CONFIG: Remove the default for confDEF_USER_ID so the binary can
                pick the proper default value.  See the SECURITY note
                above for more information.
        CONFIG: FEATURE(nodns) now warns the user that the feature is a
                no-op.  Patch from Kari Hurtta of the Finnish
                Meteorological Institute.
        CONFIG: OSTYPE(osf1) now sets DefaultUserID (confDEF_USER_ID) to
                daemon since DEC's /bin/mail will drop the envelope
                sender if run as mailnull.  See the Digital UNIX section
                of src/README for more information.  Problem noted by
                Kari Hurtta of the Finnish Meteorological Institute.
        CONFIG: .cf files are now stored in the same directory with the
                .mc files instead of in the obj directory.
        CONFIG: New options confSINGLE_LINE_FROM_HEADER,
                confALLOW_BOGUS_HELO, and confMUST_QUOTE_CHARS for
                setting SingleLineFromHeader, AllowBogusHELO, and
                MustQuoteChars respectively.
        MAIL.LOCAL: support -l flag to run LMTP on stdin/stdout.  This
                SMTP-like protocol allows detailed reporting of delivery
                status on a per-user basis.  Code donated by John Myers of
                CMU (now of Netscape).
        MAIL.LOCAL: HP-UX support from Randall S. Winchester of the
                University of Maryland.  NOTE: mail.local is not
                compatible with the stock HP-UX mail format.  Be sure to
                read mail.local/README.
        MAIL.LOCAL: Prevent other mail delivery agents from stealing a
                mailbox lock.  Patch from Randall S. Winchester of the
                University of Maryland.
        MAIL.LOCAL: glibc portability from John Kennedy of Cal State
                University, Chico.
        MAIL.LOCAL: IRIX portability from Kari Hurtta of the Finnish
                Meteorological Institute.
        MAILSTATS: Display the number of rejected and discarded messages
                in the StatusFile.  Patch from Randall Winchester of the
                University of Maryland.
        MAKEMAP: New -s flag to ignore safety checks on database map files
                such as linked files in world writable directories.
        MAKEMAP: Add support for Berkeley DB 2.X.  Remove OLD_NEWDB support.
        PRALIASES: Add support for Berkeley DB 2.X.
        PRALIASES: Do not automatically include NDBM support.  Problem
                noted by Ralf Hildebrandt of the Technical University of
                Braunschweig.
        RMAIL: Improve portability for other platforms.  Patches from
                Randall S. Winchester of the University of Maryland and
                Kari Hurtta of the Finnish Meteorological Institute.
        Changed Files:
                src/Makefiles/Makefile.* files have been modified to use
                        the new build mechanism and are now BuildTools/OS/*.
                src/makesendmail changed to symbolic link to src/Build.
        New Files:
                BuildTools/M4/header.m4
                BuildTools/M4/depend/BSD.m4
                BuildTools/M4/depend/CC-M.m4
                BuildTools/M4/depend/NCR.m4
                BuildTools/M4/depend/Solaris.m4
                BuildTools/M4/depend/X11.m4
                BuildTools/M4/depend/generic.m4
                BuildTools/OS/AIX.4.2
                BuildTools/OS/AIX.4.x
                BuildTools/OS/CRAYT3E.2.0.x
                BuildTools/OS/HP-UX.11.x
                BuildTools/OS/IRIX.6.5
                BuildTools/OS/NEXTSTEP.4.x
                BuildTools/OS/NeXT.4.x
                BuildTools/OS/NetBSD.8.3
                BuildTools/OS/QNX
                BuildTools/OS/SunOS.5.7
                BuildTools/OS/dcosx.1.x.NILE
                BuildTools/README
                BuildTools/Site/README
                BuildTools/bin/Build
                BuildTools/bin/configure.sh
                BuildTools/bin/find_m4.sh
                BuildTools/bin/install.sh
                Makefile
                cf/cf/Build
                cf/cf/generic-hpux10.cf
                cf/feature/accept_unqualified_senders.m4
                cf/feature/accept_unresolvable_domains.m4
                cf/feature/access_db.m4
                cf/feature/blacklist_recipients.m4
                cf/feature/loose_relay_check.m4
                cf/feature/local_lmtp.m4
                cf/feature/promiscuous_relay.m4
                cf/feature/rbl.m4
                cf/feature/relay_based_on_MX.m4
                cf/feature/relay_entire_domain.m4
                cf/feature/relay_hosts_only.m4
                cf/feature/relay_local_from.m4
                cf/ostype/qnx.m4
                contrib/doublebounce.pl
                mail.local/Build
                mail.local/Makefile.m4
                mail.local/README
                mailstats/Build
                mailstats/Makefile.m4
                makemap/Build
                makemap/Makefile.m4
                praliases/Build
                praliases/Makefile.m4
                rmail/Build
                rmail/Makefile.m4
                rmail/rmail.0
                smrsh/Build
                smrsh/Makefile.m4
                src/Build
                src/Makefile.m4
                src/snprintf.c
        Deleted Files:
                cf/cf/Makefile (replaced by Makefile.dist)
                mail.local/Makefile
                mail.local/Makefile.dist
                mailstats/Makefile
                mailstats/Makefile.dist
                makemap/Makefile
                makemap/Makefile.dist
                praliases/Makefile
                praliases/Makefile.dist
                rmail/Makefile
                smrsh/Makefile
                smrsh/Makefile.dist
                src/Makefile
                src/Makefiles/Makefile.AIX.4 (split into AIX.4.x and AIX.4.2)
                src/Makefiles/Makefile.SMP_DC.OSx.NILE
                        (renamed BuildTools/OS/dcosx.1.x.NILE)
                src/Makefiles/Makefile.Utah (obsolete platform)
        Renamed Files:
                READ_ME => README
                cf/cf/Makefile.dist => Makefile
                cf/cf/obj/* => cf/cf/*
                src/READ_ME => src/README

8.8.8/8.8.8     1997/10/24
        If the check_relay ruleset failed, the relay= field was logged
                incorrectly.  Problem noted by Kari Hurtta of the Finnish
                Meteorological Institute.
        If /usr/tmp/dead.letter already existed, sendmail could not
                add additional bounces to it.  Problem noted by Thomas J.
                Arseneault of SRI International.
        If an SMTP mailer used a non-standard port number for the outgoing
                connection, it would be displayed incorrectly in verbose mode.
                Problem noted by John Kennedy of Cal State University, Chico.
        Log the ETRN parameter specified by the client before altering them
                to internal form.  Suggested by Bob Kupiec of GES-Verio.
        EXPN and VRFY SMTP commands on malformed addresses were logging as
                User unknown with bogus delay= values.  Change them to log
                the same as compliant addresses.  Problem noted by Kari E.
                Hurtta of the Finnish Meteorological Institute.
        Ignore the debug resolver option unless using sendmail debug trace
                option for resolver.  Problem noted by Greg Nichols of Wind
                River Systems.
        If SingleThreadDelivery was enabled and the remote server returned a
                protocol error on the DATA command, the connection would be
                closed but the persistent host status file would not be
                unlocked so other sendmail processes could not deliver to
                that host.  Problem noted by Peter Wemm of DIALix.
        If queueing up a message due to an expensive mailer, don't increment
                the number of delivery attempts or set the last delivery
                attempt time so the message will be delivered on the next
                queue run regardless of MinQueueAge.  Problem noted by
                Brian J. Coan of the Institute for Global Communications.
        Authentication warnings of "Processed from queue _directory_" and
                "Processed by _username_ with -C _filename_" would be logged
                with the incorrect timestamp.  Problem noted by Kari E. Hurtta
                of the Finnish Meteorological Institute.
        Use a better heuristic for detecting GDBM.
        Log null connections on dropped connections.  Problem noted by
                Jon Lewis of Florida Digital Turnpike.
        If class dbm maps are rebuilt, sendmail will now detect this and
                reopen the map.  Previously, they could give stale
                results during a single message processing (but would
                recover when the next message was received).  Fix from
                Joe Pruett of Q7 Enterprises.
        Do not log failures such as "User unknown" on -bv or SMTP VRFY
                requests.  Problem noted by Kari E. Hurtta of the
                Finnish Meteorological Institute.
        Do not send a bounce message back to the sender regarding bad
                recipients if the SMTP connection is dropped before the
                message is accepted.  Problem noted by Kari E. Hurtta of the
                Finnish Meteorological Institute.
        Use "localhost" instead of "[UNIX: localhost]" when connecting to
                sendmail via a UNIX pipe.  This will allow rulesets using
                $&{client_name} to process without sending the string through
                dequote.  Problem noted by Alan Barrett of Internet Africa.
        A combination of deferred delivery mode, a double bounce situation,
                and the inability to save a bounce message to
                /var/tmp/dead.letter would cause sendmail to send a bounce
                to postmaster but not remove the offending envelope from the
                queue causing it to create a new bounce message each time the
                queue was run.  Problem noted by Brad Doctor of Net Daemons
                Associates.
        Remove newlines from hostname information returned via DNS.  There are
                no known security implications of newlines in hostnames as
                sendmail filters newlines in all vital areas; however, this
                could cause confusing error messages.
        Starting with sendmail 8.8.6, mail sent with the '-t' option would be
                rejected if any of the specified addresses were bad.  This
                behavior was modified to only reject the bad addresses and not
                the entire message.  Problem noted by Jozsef Hollosi of
                SuperNet, Inc.
        Use Timeout.fileopen when delivering mail to a file.  Suggested by
                Bryan Costales of InfoBeat, Inc.
        Display the proper Final-Recipient on DSN messages for non-SMTP
                mailers.  Problem noted by Kari E. Hurtta of the
                Finnish Meteorological Institute.
        An error in calculating the available space in the list of addresses
                for logging deliveries could cause an address to be silently
                dropped.
        Include the initial user environment if sendmail is restarted via
                a HUP signal.  This will give room for the process title.
                Problem noted by Jon Lewis of Florida Digital Turnpike.
        Mail could be delivered without a body if the machine does not
                support flock locking and runs out of processes during
                delivery.  Fix from Chuck Lever of the University of Michigan.
        Drop recipient address from 251 and 551 SMTP responses per RFC 821.
                Problem noted by Kari E. Hurtta of the Finnish Meteorological
                Institute.
        Make sure non-rebuildable database maps are opened before the
                rebuildable maps (i.e., alias files) in case the database maps
                are needed for verifying the left hand side of the aliases.
                Problem noted by Lloyd Parkes of Victoria University.
        Make sure sender RFC822 source route addresses are alias expanded for
                bounce messages.  Problem noted by Juergen Georgi of
                RUS University of Stuttgart.
        Minor lint fixes.
        Return a temporary error instead of a permanent error if an LDAP map
                search returns an error.  This will allow sequenced maps which
                use other LDAP servers to be checked.  Fix from Booker Bense
                of Stanford University.
        When automatically converting from quoted printable to 8bit text do
                not pad bare linefeeds with a space.  Problem noted by Theo
                Nolte of the University of Technology Aachen, Germany.
        Portability:
                Non-standard C compilers may have had a problem compiling
                        conf.c due to a standard C external declaration of
                        setproctitle().  Problem noted by Ted Roberts of
                        Electronic Data Systems.
                AUX: has a broken O_EXCL implementation.  Reported by Jim
                        Jagielski of jaguNET Access Services.
                BSD/OS: didn't compile if HASSETUSERCONTEXT was defined.
                Digital UNIX: Digital UNIX (and possibly others) moves
                        loader environment variables into the loader memory
                        area.  If one of these environment variables (such as
                        LD_LIBRARY_PATH) was the last environment variable,
                        an invalid memory address would be used by the process
                        title routine causing memory corruption.  Problem
                        noted by Sam Hartman of Mesa Internet Systems.
                GNU libc: uses an enum for _PC_CHOWN_RESTRICTED which caused
                        chownsafe() to always return 0 even if the OS does
                        not permit file giveaways.  Problem noted by
                        Yasutaka Sumi of The University of Tokyo.
                IRIX6: Syslog buffer size set to 512 bytes.  Reported by
                        Gerald Rinske of Siemens Business Services VAS.
                Linux: Pad process title with NULLs.  Problem noted by
                        Jon Lewis of Florida Digital Turnpike.
                SCO OpenServer 5.0: SIOCGIFCONF ioctl call returns an
                        incorrect value for the number of interfaces.
                        Problem noted by Chris Loelke of JetStream Internet
                        Services.
                SINIX: Update for Makefile and syslog buffer size from Gerald
                        Rinske of Siemens Business Services VAS.
                Solaris: Make sure HASGETUSERSHELL setting for SunOS is not
                        used on a Solaris machine.  Problem noted by
                        Stephen Ma of Jtec Pty Limited.
                CONFIG: SINIX: Update from Gerald Rinske of Siemens Business
                        Services VAS.
        MAKEMAP: Use a better heuristic for detecting GDBM.
        CONTRIB: expn.pl: Updated version from the author, David Muir Sharnoff.
        OP.ME: Document the F=i mailer flag.  Problem noted by Per Hedeland of
                        Ericsson.

8.8.7/8.8.7     1997/08/03
        If using Berkeley DB on systems without O_EXLOCK (open a file with
                an exclusive lock already set -- i.e., almost all systems
                except 4.4-BSD derived systems), the initial attempt at
                rebuilding aliases file if the database didn't already
                exist would fail.  Patch from Raymund Will of LST Software
                GmbH.
        Bogus incoming SMTP commands would reset the SMTP conversation.
                Problem noted by Fredrik Jönsson of the Royal Institute
                of Technology, Stockholm.
        Since TCP Wrappers includes setenv(), unsetenv(), and putenv(),
                some environments could give "multiple definitions" for these
                routines during compilation.  If using TCP Wrappers, assume
                that these routines are included as though they were in the
                C library.  Patch from Robert La Ferla.
        When a NEWDB database map was rebuilt at the same time it was being
                used by a queue run, the maps could be left locked for the
                duration of the queue run, causing other processes to hang.
                Problem noted by Kendall Libby of Shore.NET.
        In some cases, NoRecipientAction=add-bcc was being ignored, so the
                mail was passed on without any recipient header.  This could
                cause problems downstream.  Problem noted by Xander Jansen
                of SURFnet ExpertiseCentrum.
        Give error when GDBM is used with sendmail.  GDBM's locking and
                linking of the .dir and .pag files interferes with sendmail's
                locking and security checks.  Problems noted by Fyodor
                Yarochkin of the Kyrgyz Republic FreeNet.
        Don't fsync qf files if SuperSafe option is not set.
        Avoid extra calls to gethostbyname for addresses for which a
                gethostbyaddr found no value.  Also, ignore any returns
                from gethostbyaddr that look like a dotted quad.
        If PTR lookup fails when looking up an SMTP peer, don't tag it as
                "may be forged", since at the network level we pretty much
                have to assume that the information is good.
        In some cases, errors during an SMTP session could leave files
                open or locked.
        Better handling of missing file descriptors (0, 1, 2) on startup.
        Better handling of non-set-user-ID binaries -- avoids certain obnoxious
                errors during testing.
        Errors in file locking of NEWDB maps had the incorrect file name
                printed in the error message.
        If the AllowBogusHELO option were set and an EHLO with a bad or
                missing parameter were issued, the EHLO behaved like a HELO.
        Load limiting never kicked in for incoming SMTP transactions if the
                DeliveryMode=background and any recipient was an alias or
                had a .forward file.  From Nik Conwell of Boston University.
        On some non-Posix systems, the decision of whether chown(2) permits
                file giveaway was undefined.  From Tetsu Ushijima of the
                Tokyo Institute of Technology.
        Fix race condition that could cause the body of a message to be
                lost (so only the header was delivered).  This only occurs
                on systems that do not use flock(2), and only when a queue
                runner runs during a critical section in another message
                delivery.  Based on a patch from Steve Schweinhart of
                Results Computing.
        If a qf file was found in a mail queue directory that had a problem
                (wrong ownership, bad format, etc.) and the file name was
                exactly MAXQFNAME bytes long, then instead of being tried
                once, it would be tried on every queue run.  Problem noted
                by Bryan Costales of Mercury Mail.
        If the system supports an st_gen field in the status structure,
                include it when reporting that a file has changed after open.
                This adds a new compile flag, HAS_ST_GEN (0/1 option).
                This out to be checked as well as reported, since it is
                theoretically possible for an attacker to remove a file after
                it is opened and replace it with another file that has the
                same i-number, but some filesystems (notably AFS) return
                garbage in this field, and hence always look like the file
                has changed.  As a practical matter this is not a security
                problem, since the files can be neither hard nor soft links,
                and on no filesystem (that I am aware of) is it possible to
                have two files on the same filesystem with the same i-number
                simultaneously.
        Delete the root Makefile from the distribution -- it is only for
                use internally, and does not work at customer sites.
        Fix botch that caused the second MAIL FROM: command in a single
                transaction to clear the entire transaction.  Problem
                noted by John Kennedy of Cal State University, Chico.
        Work properly on machines that have _PATH_VARTMP defined without
                a trailing slash.  (And a pox on vendors that decide to
                ignore the established conventions!)  Problem noted by
                Gregory Neil Shapiro of WPI.
        Internal changes to make it easier to add another protocol family
                (intended for IPv6).  Patches are from John Kennedy of
                CSU Chico.
        In certain cases, 7->8 bit MIME decoding of Base64 text could leave
                an extra space at the beginning of some lines.  Problem
                noted by Charles Karney of Princeton University; fix based
                on a patch from Christophe Wolfhugel.
        Portability:
                Allow _PATH_VENDOR_CF to be set in Makefile for consistency
                        with the _Sendmail_ book, 2nd edition.  Note that
                        the book is actually wrong: _PATH_SENDMAILCF should
                        be used instead.
                AIX 3.x: Include <sys/select.h>.  Patch from Gene Rackow
                        of Argonne National Laboratory.
                OpenBSD from from Paul DuBois of the University of Wisconsin.
                RISC/os 4.0 from Paul DuBois of the University of Wisconsin.
                SunOS: Include <memory.h> to fix warning from util.c.  From
                        James Aldridge of EUnet Ltd.
                Solaris: Change STDIR (location of status file) to /etc/mail
                        in Makefiles.
                Linux, Dynix, UNICOS: Remove -DNDBM and -lgdbm from
                        Makefiles.  Use NEWDB on Linux instead.
                NCR MP-RAS 3.x with STREAMware TCP/IP: SIOCGIFNUM ioctl
                        exists but behaves differently than other OSes.
                        Add SIOCGIFNUM_IS_BROKEN compile flag to get
                        around the problem.  Problem noted by Tom Moore of
                        NCR Corp.
                HP-UX 9.x: fix compile warnings for old select API.  Problem
                        noted by Tom Smith of Digital Equipment Corp.
                UnixWare 2.x: compile warnings on offsetof macro.  Problem
                        noted by Tom Good of the Community Access Information
                        Resource Network
                SCO 4.2: compile problems caused by a change in the type of
                        the "length" parameters passed to accept, getpeername,
                        getsockname, and getsockopt.  Adds new compile flags
                        SOCKADDR_SIZE_T and SOCKOPT_SIZE_T.  Problem reported
                        by Tom Good of St. Vincent's North Richmond Community
                        Mental Health Center Residential Services.
                AIX 4: Use size_t for SOCKADDR_SIZE_T and SOCKOPT_SIZE_T.
                        Suggested by Brett Hogden of Rochester Gas & Electric
                        Corp.
                Linux: avoid compile problem for versions of <setjmp.h> that
                        #define both setjmp and longjmp.  Problem pointed out
                        by J.R. Oldroyd of TerraNet.
                CONFIG: SCO UnixWare 2.1: Support for OSTYPE(sco-uw-2.1)
                        from Christopher Durham of SCO.
                CONFIG: NEXTSTEP: define confCW_FILE to
                        /etc/sendmail/sendmail.cw to match the usual
                        configuration.  Patch from Dennis Glatting of
                        PlainTalk.
        CONFIG: MAILER(fax) called a program that hasn't existed for a long
                time.  Convert to use the HylaFAX 4.0 conventions.  Suggested
                by Harry Styron.
        CONFIG: Improve sample anti-spam rulesets in cf/cf/knecht.mc.  These
                are the rulesets in use on sendmail.org.
        MAKEMAP: give error on GDBM files.
        MAIL.LOCAL: Make error messages a bit more explicit, for example,
                telling more details on what actually changed when "file
                changed after open".
        CONTRIB: etrn.pl: Ignore comments in Fw files.  Support multiple Fw
                files.
        CONTRIB: passwd-to-alias.pl: Handle 8 bit characters and '-'.
        NEW FILES:
                src/Makefiles/Makefile.OpenBSD
                src/Makefiles/Makefile.RISCos.4_0
                test/t_exclopen.c
                cf/ostype/sco-uw-2.1.m4
        DELETED FILES:
                Makefile

8.8.6/8.8.6     1997/06/14
            *************************************************************
            * The extensive assistance of Gregory Neil Shapiro of WPI   *
            * in preparing this release is gratefully appreciated.      *
            * Sun Microsystems has also provided resources toward       *
            * continued sendmail development.                           *
            *************************************************************
        SECURITY: A few systems allow an open with the O_EXCL|O_CREAT open
                mode bits set to create a file that is a symbolic link that
                points nowhere.  This makes it possible to create a root
                owned file in an arbitrary directory by inserting the symlink
                into a writable directory after the initial lstat(2) check
                determined that the file did not exist.  The only verified
                example of a system having these odd semantics for O_EXCL
                and symbolic links was HP-UX prior to version 9.07.  Most
                systems do not have the problem, since a exclusive create
                of a file disallows symbolic links.  Systems that have been
                verified to NOT have the problem include AIX 3.x, *BSD,
                DEC OSF/1, HP-UX 9.07 and higher, Linux, SunOS, Solaris,
                and Ultrix.  This is a potential exposure on systems that
                have this bug and which do not have a MAILER-DAEMON alias
                pointing at a legitimate account, since this will cause old
                mail to be dropped in /var/tmp/dead.letter.
        SECURITY: Problems can occur on poorly managed systems, specifically,
                if maps or alias files are in world writable directories.
                If your system has alias maps in writable directories, it
                is potentially possible for an attacker to replace the .db
                (or .dir and .pag) files by symbolic links pointing at
                another database; this can be used either to expose
                information (e.g., by pointing an alias file at /etc/spwd.db
                and probing for accounts), or as a denial-of-service attack
                (by trashing the password database).  The fix disallows
                symbolic links entirely when rebuilding alias files or on
                maps that are in writable directories, and always warns on
                writable directories; 8.9 will probably consider writable
                directories to be fatal errors.  This does not represent an
                exposure on systems that have alias files in unwritable
                system directories.
        SECURITY: disallow .forward or :include: files that are links (hard
                or soft) if the parent directory (or any directory in the
                path) is writable by anyone other than the owner.  This is
                similar to the previous case for user files.  This change
                should not affect most systems, but is necessary to prevent
                an attacker who can write the directory from pointing such
                files at other files that are readable only by the owner.
        SECURITY: Tighten safechown rules: many systems will say that they
                have a safe (restricted to root) chown even on files that
                are mounted from another system that allows owners to give
                away files.  The new rules are very strict, trusting file
                ownership only in those few cases where the system has
                been verified to be at least as paranoid as necessary.
                However, it is possible to relax the rules to partially
                trust the ownership if the directory path is not world or
                group writable.  This might allow someone who has a legitimate
                :include: file (referenced directly from /etc/aliases) to
                become another non-root user if the :include: file is in a
                non-writable directory on an NFS-mounted filesystem where
                the local system says that giveaway is denied but it is
                actually permitted.  I believe this to be a very small set
                of cases.  If in doubt, do not point :include: aliases at
                NFS-mounted filesystems.
        SECURITY: When setting a numeric group id using the RunAsUser option
                (e.g., "O RunAsUser=10:20", the group id would not be set.
                Implicit group ids (e.g., "O RunAsUser=mailnull") or alpha
                group ids (e.g., "O RunAsUser=mailuser:mailgrp") worked fine.
                The user id was still set properly.  Problem noted by Uli
                Pralle of the Technical University of Berlin.
        Save the initial gid set for use when checking for if the
                PrivacyOptions=restrictmailq option is set.  Problem reported
                by Wolfgang Ley of DFN-CERT.
        Make 55x reply codes to the SMTP DATA-"." be non-sticky (i.e., a
                failure on one message won't affect future messages to the
                same host).
        IP source route printing had an "off by one" error that would
                affect any options that came after the route option.  Patch
                from Theo de Raadt.
        The "Message is too large" error didn't successfully bounce the error
                back to the sender.  Problem reported by Stephen More of
                PSI; patch from Gregory Neil Shapiro of WPI.
        Change SMTP status code 553 to map into Extended code 5.1.0 (instead
                of 5.1.3); it apparently gets used in multiple ways.
                Suggested by John Myers of Portola Communications.
        Fix possible extra null byte generated during collection if errors
                occur at the beginning of the stream.  Patch contributed by
                Andrey A. Chernov and Gregory Neil Shapiro.
        Code changes to avoid possible reentrant call of malloc/free within
                a signal handler.  Problem noted by John Beck of Sun
                Microsystems.
        Move map initialization to be earlier so that check_relay ruleset
                will have the latest version of the map data.  Problem noted
                by Paul Forgey of Metainfo; patch from Gregory Neil Shapiro.
        If there are fatal errors during the collection phase (e.g., message
                too large) don't send the bogus message.
        Avoid "cannot open xfAAA00000" messages when sending to aliases that
                have errors and have owner- aliases.  Problem noted by Michael
                Barber of MTU; fix from Gregory Neil Shapiro of WPI.
        Avoid null pointer dereference on illegal Boundary= parameters in
                multipart/mixed Content-Type: header.  Problem noted by
                Richard Muirden of RMIT University.
        Always print error messages during newaliases (-bi) even if the
                ErrorMode is not set to "print".  Fix from Gregory Neil
                Shapiro.
        Test mode could core dump if you did a /map lookup in an optional map
                that could not be opened.  Based on a fix from John Beck of
                Sun Microsystems.
        If DNS is misconfigured so that the last MX record tried points to
                a host that does not have an A record, but other MX records
                pointed to something reasonable, don't bounce the message
                with a "host unknown" error.  Note that this should really
                be fixed in the zone file for the domain.  Problem noted by
                Joe Rhett of Navigist, Inc.
        If a map fails (e.g., DNS times out) on all recipient addresses, mark
                the message as having been tried; otherwise the next queue
                run will not realize that this is a second attempt and will
                retry immediately.  Problem noted by Bryan Costales of
                Mercury Mail.
        If the clock is set backwards, and a MinQueueAge is set, no jobs
                will be run until the later setting of the clock is reached.
                "Problem" (I use the term loosely) noted by Eric Hagberg of
                Morgan Stanley.
        If the load average rises above the cutoff threshold (above which
                sendmail will not process the queue at all) during a queue
                run, abort the queue run immediately.  Problem noted by
                Bryan Costales of Mercury Mail.
        The variable queue processing algorithm (based on the message size,
                number of recipients, message precedence, and job age) was
                non-functional -- either the entire queue was processed or
                none of the queue was processed.  The updated algorithm
                does no queue run if a single recipient zero size job will
                not be run.
        If there is a fatal ("panic") message that will cause sendmail to
                die immediately, never hold the error message for future
                printing.
        Force ErrorMode=print in -bt mode so that all errors are printed
                regardless of the setting of the ErrorMode option in the
                configuration file.  Patch from Gregory Neil Shapiro.
        New compile flag HASSTRERROR says that this OS has the strerror(3)
                routine available in one of the libraries.  Use it in conf.h.
        The -m (match only) flag now works on host class maps.
        If class hash or btree maps are rebuilt, sendmail will now detect
                this and reopen the map.  Previously, they could give
                erroneous results during a single message processing
                (but would recover when the next message was received).
        Don't delete zero length queue files when doing queue runs until the
                files are at least ten minutes old.  This avoids a potential
                race condition: the creator creates the qf file, getting back
                a file descriptor.  The queue runner locks it and deletes it
                because it is zero length.  The creator then writes the
                descriptor that is now for a disconnected file, and the
                job goes away.  Based on a suggestion by Bryan Costales.
        When determining the "validated" host name ($_ macro), do a forward
                (A) DNS lookup on the result of the PTR lookup and compare
                results.  If they differ or if the PTR lookup fails, tag the
                address as "may be forged".
        Log null connections (i.e., hosts that connect but do not do any
                substantive activity on the connection before disconnecting;
                "substantive" is defined to be MAIL, EXPN, VRFY, or ETRN.
        Always permit "writes" to /dev/null regardless of the link count.
                This is safe because /dev/null is special cased, and no open
                or write is ever actually attempted.  Patch from Villy Kruse
                of TwinCom.
        If a message cannot be sent because of a 552 (exceeded storage
                allocation) response to the MAIL FROM:<>, and a SIZE= parameter
                was given, don't return the body in the bounce, since there
                is a very good chance that the message will double-bounce.
        Fix possible line truncation if a quoted-printable had an =00 escape
                in the body.  Problem noted by Charles Karney of the Princeton
                Plasma Physics Laboratory.
        Notify flags (e.g., -NSUCCESS) were lost on user+detail addresses.
                Problem noted by Kari Hurtta of the Finnish Meteorological
                Institute.
        The MaxDaemonChildren option wasn't applying to queue runs as
                documented.  Note that this increases the potential denial
                of service problems with this option: an attacker can
                connect many times, and thereby lock out queue runs as well
                as incoming connections.  If you use this option, you should
                run the "sendmail -bd" and "sendmail -q30m" jobs separately
                to avoid this attack.  Failure to limit noted by Matthew
                Dillon of BEST Internet Communications.
        Always give a message in newaliases if alias files cannot be
                opened instead of failing silently.  Suggested by Gregory
                Neil Shapiro.  This change makes the code match the O'Reilly
                book (2nd edition).
        Some older versions of the resolver could return with h_errno == -1
                if no name server could be reached, causing mail to bounce
                instead of queueing.  Treat this like TRY_AGAIN.  Fix from
                John Beck of SunSoft.
        If a :include: file is owned by a user that does not have an entry
                in the passwd file, sendmail could dereference a null pointer.
                Problem noted by Satish Mynam of Sun Microsystems.
        Take precautions to make sure that the SMTP protocol cannot get out
                of sync if (for example) an alias file cannot be opened.
        Fix a possible race condition that can cause a SIGALRM to come in
                immediately after a SIGHUP, causing the new sendmail to die.
        Avoid possible hang on SVr3 systems when doing child reaping.  Patch
                from Villy Kruse of TwinCom.
        Ignore improperly formatted SMTP reply codes.  Previously these were
                partially processed, which could cause confusing error
                returns.
        Fix possible bogus pointer dereference when doing ldapx map lookups
                on some architectures.
        Portability:
                A/UX: from Jim Jagielski of NASA/GSFC.
                glibc: SOCK_STREAM was changed from a #define to an enum,
                        thus breaking #ifdef SOCK_STREAM.  Only option seems
                        to be to assume SOCK_STREAM if __GNU_LIBRARY__ is
                        defined.  Problem reported by A Sun of the University
                        of Washington.
                Solaris: use SIOCGIFNUM to get the number of interfaces on
                        the system rather than guessing at compile time.
                        Patch contributed by John Beck of Sun Microsystems.
                Intel Paragon: from Wendy Lin of Purdue University.
                GNU Hurd: from Miles Bader of the GNU project.
                RISC/os 4.50 from Harlan Stenn of PFCS Corporation.
                ISC Unix: wait never returns if SIGCLD signals are blocked.
                        Unfortunately releasing them opens a race condition,
                        but there appears to be no fix for this.  Patch from
                        Gregory Neil Shapiro.
                BIND 8.1 for IPv6 compatibility from John Kennedy.
                Solaris: a bug in strcasecmp caused characters with the
                        high order bit set to apparently randomly match
                        letters -- for example, $| (0233) matches "i" and "I".
                        Problem noted by John Gregson of the University of
                        Cambridge.
                IRIX 6.x: make Makefile.IRIX.6.2 apply to all 6.x.  From
                        Kari Hurtta.
                IRIX 6.x: Create Makefiles for systems that claim to be
                        IRIX64 but are 6.2 or higher (so use the regular
                        IRIX Makefile).
                IRIX 6.x: Fix load average computation on 64 bit kernels.
                        Problem noted by Eric Hagberg of Morgan Stanley.
        CONFIG: Some canonification was still done for UUCP-like addresses
                even if FEATURE(nocanonify) was set.  Problem pointed out by
                Brian Candler.
        CONFIG: In some cases UUCP mailers wouldn't properly recognize all
                local names as local.  Problem noted by Jeff Polk of BSDI;
                fix provided by Gregory Neil Shapiro.
        CONFIG: The "local:user" syntax entries in mailertables and other
                "mailer:user" syntax locations returned an incorrect value
                for the $h macro.  Problem noted by Gregory Neil Shapiro.
        CONFIG: Retain "+detail" information when forwarding mail to a
                MAIL_HUB, LUSER_RELAY, or LOCAL_RELAY.  Patch from Philip
                Guenther of Gustavus Adolphus College.
        CONFIG: Make sure user+detail works for FEATURE(virtusertable);
                rules are the same as for aliasing.  Based on a patch from
                Gregory Neil Shapiro.
        CONFIG: Break up parsing rules into several pieces; this should
                have no functional change in this release, but makes it
                possible to have better anti-spam rulesets in the future.
        CONFIG: Disallow double dots in host names to avoid having the
                HostStatusDirectory store status under the wrong name.
                In some cases this can be used as a denial-of-service attack.
                Problem noted by Ron Jarrell of Virginia Tech, patch from
                Gregory Neil Shapiro.
        CONFIG: Don't use F=m (multiple recipients per invocation) for
                MAILER(procmail), but do pass F=Pn9 (include Return-Path:,
                don't include From_, and convert to 8-bit).  Suggestions
                from Kimmo Suominen and Roderick Schertler.
        CONFIG: Domains under $=M (specified with MASQUERADE_DOMAIN) were
                being masqueraded as though FEATURE(masquerade_entire_domain)
                was specified, even when it wasn't.
        MAIL.LOCAL: Solaris 2.6 has snprintf.  From John Beck of SunSoft.
        MAIL.LOCAL: SECURITY: check to make sure that an attacker doesn't
                "slip in" a symbolic link between the lstat(2) call and the
                exclusive open.  This is only a problem on System V derived
                systems that allow an exclusive create on files that are
                symbolic links pointing nowhere.
        MAIL.LOCAL: If the final mailbox close() failed, the user id was
                not reset back to root, which on some systems would cause
                later mailboxes to fail.  Also, any partial message would
                not be truncated, which could result in repeated deliveries.
                Problem noted by Bruce Evans via Peter Wemm (FreeBSD
                developers).
        MAKEMAP: Handle cases where O_EXLOCK is #defined to be 0.  A similar
                change to the sendmail map code was made in 8.8.3.  Problem
                noted by Gregory Neil Shapiro.
        MAKEMAP: Give warnings on file problems such as map files that are
                symbolic links; although makemap is not set-user-ID root, it is
                often run as root and hence has the potential for the same
                sorts of problems as alias rebuilds.
        MAKEMAP: Change compilation so that it will link properly on
                NEXTSTEP.
        CONTRIB: etrn.pl: search for Cw as well as Fw lines in sendmail.cf.
                Accept an optional list of arguments following the server
                name for the ETRN arguments to use (instead of $=w).  Other
                miscellaneous bug fixes.  From Christian von Roques via
                John Beck of Sun Microsystems.
        CONTRIB: Add passwd-to-alias.pl, contributed by Kari Hurtta.  This
                Perl script converts GECOS information in the /etc/passwd
                file into aliases, allowing for faster access to full name
                lookups; it is also clever about adding aliases (to root)
                for system accounts.
        NEW FILES:
                src/safefile.c
                cf/ostype/gnuhurd.m4
                cf/ostype/irix6.m4
                contrib/passwd-to-alias.pl
                src/Makefiles/Makefile.IRIX64.6.1
                src/Makefiles/Makefile.IRIX64.6.x
        RENAMED FILES:
                src/Makefiles/Makefile.IRIX.6.2 =>      Makefile.IRIX.6.x
                src/Makefiles/Makefile.IRIX64 =>        Makefile.IRIX64.6.0

8.8.5/8.8.5     1997/01/21
        SECURITY: Clear out group list during startup.  Without this, sendmail
                will continue to run with the group permissions of the caller,
                even if RunAsUser is specified.
        SECURITY: Make purgestat (-bH) be root-only.  This is not in response
                to any known attack, but it's best to be conservative.
                Suggested by Peter Wemm of DIALix.
        SECURITY: Fix buffer overrun problem in MIME code that has possible
                security implications.  Patch from Alex Garthwaite of the
                University of Pennsylvania.
        Use of a -f flag with a phrase attached (e.g., "-f 'Full Name <addr>'")
                would truncate the address after "Full".  Although the -f
                syntax is incorrect (since it is in the envelope, it
                shouldn't have comments and full names), the failure mode
                was unnecessarily awful.
        Fix a possible null pointer dereference when converting 8-bit data
                to a 7-bit format.  Problem noted by Jim Hutchins of
                Sandia National Labs and David James of British Telecom.
        Clear out stale state that affected F=9 on SMTP mailers in queue
                runs.  Although this really shouldn't be used (F=9 is for
                final delivery only, and using it on an SMTP mailer makes
                it possible for a message to be converted from 8->7->8->7
                bits several times), it shouldn't have failed with a syserr.
                Problem noted by Eric Hagberg of Morgan Stanley.
        _Really_ fix the multiple :maildrop code in the user database
                module.  Patch from Roy Mongiovi of Georgia Tech.
        Let F lines in the configuration file actually read root-only
                files if the configuration file is safe.  Based on a
                patch from Keith Reynolds of SCO.
        ETRN followed by QUIT would hold the connection open until the queue
                run completed.  Problem noted by Truck Lewis of TDK
                Semiconductor Corp.
        It turns out that despite the documentation, the TCP wrappers library
                does _not_ log rejected connections.  Do the logging ourselves.
                Problem noted by Fletcher Mattox of the University of Texas
                at Austin.
        If sendmail finds a qf file in its queue directory that is an unknown
                version (e.g., when backing out to an old version), the
                error is reported on every queue run.  Change it to only
                give the error once (and rename the qf => Qf).  Patch from
                William A. Gianopoulos of Raytheon Company.
        Start a new session when doing background delivery; currently it
                ignored signals but didn't start a new signal, that caused
                some problems if a background process tried to send mail
                under certain circumstances.  Problem noted by Eric Hagberg
                of Morgan Stanley; fix from Kari Hurtta.
        Simplify test for skipping a queue run to just check if the current
                load average is >= the queueing load average.  Previously
                the check factored in some other parameters that caused it
                to essentially never skip the queue run.  Patch from Bryan
                Costales.
        If the SMTP server is running in "nullserver" mode (that is, it is
                rejecting all commands), start sleeping after MAXBADCOMMAND
                (25) commands; this helps prevent a bad guy from putting
                you into a tight loop as a denial-of-service attack.  Based
                on an e-mail conversation with Brad Knowles of AOL.
        Slow down when too many "light weight" commands have been issued;
                this helps prevent a class of denial-of-service attacks.
                The current values and defaults are:
                    MAXNOOPCOMMANDS     20      NOOP, VERB, ONEX, XUSR
                    MAXHELOCOMMANDS     3       HELO, EHLO
                    MAXVRFYCOMMANDS     6       VRFY, EXPN
                    MAXETRNCOMMANDS     8       ETRN
                These will probably be configurable in a future release.
        On systems that have uid_t typedefed to be an unsigned short, programs
                that had the F=S flag and no U= equate would be invoked with
                the real uid set to 65535 rather than being left unchanged.
        In some cases, NOTIFY=NEVER was not being honored.  Problem noted
                by Steve Hubert of the University of Washington, Seattle.
        Mail that was Quoted-Printable encoded and had a soft line break on
                the last line (i.e., an incomplete continuation) had the last
                line dropped.  Since this appears to be illegal it isn't
                clear what to do with it, but flushing the last line seems
                to be a better "fail soft" approach.  Based on a patch from
                Eric Hagberg.
        If AllowBogusHELO and PrivacyOptions=needmailhelo are both set, a
                bogus HELO command still causes the "Polite people say HELO
                first" error message.  Problem pointed out by Chris Thomas
                of UCLA; patch from John Beck of SunSoft.
        Handle "sendmail -bp -qSfoobar" properly if restrictqrun is set
                in PrivacyOptions.  The -q shouldn't turn this command off.
                Problem noted by Murray Kucherawy of Pacific Bell Internet;
                based on a patch from Gregory Neil Shapiro of WPI.
        Don't consider SMTP reply codes 452 or 552 (exceeded storage allocation)
                in a DATA transaction to be sticky; these can occur because
                a message is too large, and smaller messages should still go
                through.  Problem noted by Matt Dillon of Best Internet
                Communications.
        In some cases bounces were saved in /var/tmp/dead.letter even if they
                had been successfully delivered to the envelope sender.
                Problem noted Eric Hagberg of Morgan Stanley; solution from
                Gregory Neil Shapiro of WPI.
        Give better diagnostics on long alias lines.  Based on code contributed
                by Patrick Gosling of the University of Cambridge.
        Increase the number of virtual interfaces that will be probed for
                alternate names.  Problem noted by Amy Rich of Shore.Net.
        PORTABILITY:
                UXP/DS V20L10 for Fujitsu DS/90: Makefile patches from
                        Toshiaki Nomura of Fujitsu Limited.
                SunOS with LDAP support: compile problems with struct timeval.
                        Patch from Nick Cuccia of TCSI Corporation.
                SCO: from Keith Reynolds of SCO.
                Solaris: kstat load average computation wasn't being used.
                        Fixes from Michael Ju. Tokarev of Telecom Service, JSC
                        (Moscow).
                OpenBSD: from Jason Downs of teeny.org.
                Altos System V: from Tim Rice.
                Solaris 2.5: from Alan Perry of SunSoft.
                Solaris 2.6: from John Beck of SunSoft.
                Harris Nighthawk PowerUX (mh6000 box): from Bob Miorelli
                        of Pratt & Whitney <miorelli@pweh.com>.
        CONFIG: It seems that I hadn't gotten the Received: line syntax
                _just_right_ yet.  Tweak it again.  I'll omit the names
                of the "contributors" (quantity two) in this one case.
                As of now, NO MORE DISCUSSION about the syntax of the
                Received: line.
        CONFIG: Although FEATURE(nullclient) uses EXPOSED_USER (class $=E),
                it never inserts that class into the output file.  Fix it
                so it will honor EXPOSED_USER but will _not_ include root
                automatically in this class.  Problem noted by Ronan KERYELL
                of Centre de Recherche en Informatique de l'École Nationale
                Supérieure des Mines de Paris (CRI-ENSMP).
        CONFIG: Clean up handling of "local:" syntax in relay specifications
                such as LUSER_RELAY.  This change permits the following
                syntaxes:  ``local:'' will send to the same user on the
                local machine (e.g., in a mailertable entry for "host",
                ``local:'' will cause an address addressed to user@host to
                go to user on the local machone).  ``local:user'' will send
                to the named user on the local machine.  ``local:user@host''
                is equivalent to ``local:user'' (the host is ignored).  In
                all cases, the original user@host is passed in $@ (i.e., the
                detail information).  Inspired by a report from Michael Fuhr.
        CONFIG: Strip quotes from the first word of an "error:" host
                indication.  This lets you set (for example) the LUSER_RELAY
                to be ``error:\"5.1.1\" Your Message Here''.  Note the use
                of the \" so that the resulting string is properly quoted.
                Problem noted by Gregory Neil Shapiro of WPI.
        OP.ME: documentation was inconsistent about whether sendmail did a
                NOOP or a RSET to probe the connection (it does a RSET).
                Inconsistency noted by Deeran Peethamparam.
        OP.ME: insert additional blank pages so it will print properly on
                a duplex printer.  From Matthew Black of Cal State University,
                Long Beach.

8.8.4/8.8.4     1996/12/02
        SECURITY: under some circumstances, an attacker could get additional
                permissions by hard linking to files that were group
                writable by the attacker.  The solution is to disallow any
                files that have hard links -- this will affect .forward,
                :include:, and output files.  Problem noted by Terry
                Kyriacopoulos of Interlog Internet Services.  As a
                workaround, set UnsafeGroupWrites -- always a good idea.
        SECURITY: the TryNullMXList (w) option should not be safe -- if it
                is, it is possible to do a denial-of-service attack on
                MX hosts that rely on the use of the null MX list.  There
                is no danger if you have this option turned off (the default).
                Problem noted by Dan Bernstein.  Also, make the DontInitGroups
                unsafe.  I know of no specific attack against this, although
                a denial-of-service attack is probably possible, but in theory
                you should not be able to safely tweak anything that affects
                the permissions that are used when mail is delivered.
        Purgestat could go into an infinite loop if one of the host status
                directories somehow became empty.  Problem noted by Roy
                Mongiovi of Georgia Tech.
        Processes got "lost" when counting children due to a race condition.
                This caused "proc_list_probe: lost pid" messages to be logged.
                Problem noted by several people.
        On systems with System V SIGCLD child signal semantics (notably AIX
                and HP-UX), mail transactions would print the message "451
                SMTP-MAIL: lost child: No child processes".  Problem noted
                by several people.
        Miscellaneous compiler warnings on picky compilers (or when setting
                gcc to high warning levels).  From Tom Moore of NCR Corp.
        SMTP protocol errors, and most errors on MAIL FROM: lines should
                not be persistent between runs, since they are based on the
                message rather than the host.  Problem noted by Matt Dillon
                of Best Internet Communications.
        The F=7 flag was ignored on SMTP mailers.  Problem noted by Tom Moore
                of NCR (a.k.a., AT&T Global Information Solutions).
        Avoid the possibility of having a child daemon run to completion
                (including closing the SMTP socket) before the parent has
                had a chance to close the socket; this can cause the parent
                to hang for a long time waiting for the socket to drain.
                Patch from Don Lewis of TDK Semiconductor.
        If the fork() failed in a queue run, the queue runners would not be
                rescheduled (so queue runs would stop).  Patch from Don Lewis.
        Some error conditions in ETRN could cause output without an SMTP
                status code.  Problem noted by Don Lewis.
        Multiple :maildrop addresses in the user database didn't work properly.
                Patch from Roy Mongiovi of Georgia Tech.
        Add ".db" automatically onto any user database spec that does not
                already have it; this is for consistency with makemap, the
                K line, and the documentation.  Inconsistency pointed out
                by Roy Mongiovi.
        Allow sendmail to be properly called in nohup mode.  Patch from
                Kyle Jones of UUNET.
        Change ETRN to ignore but still update host status files; previously
                it would ignore them and not save the updated status, which
                caused stale information to be maintained.  Based on a patch
                from Christopher Davis of Kapor Enterprises Inc.  Also, have
                ETRN ignore the MinQueueAge option.
        Patch long term host status to recover more gracefully from an empty
                host status file condition.  Patch from NAKAMURA Motonori
                of Kyoto University.
        Several patches to signal handling code to fix potential race
                conditions from Don Lewis.
        Make it possible to compile with -DDAEMON=0 (previously it had some
                compile errors).  This turns DAEMON, QUEUE, and SMTP into
                0/1 compilation flags.  Note that DAEMON is an obsolete
                compile flag; use NETINET instead.  Solution based on a
                patch from Bryan Costales.
        PORTABILITY FIXES:
                AIX4: getpwnam() and getpwuid() do a sequential scan of the
                        /etc/security/passwd file when called as root.  This
                        is very slow on some systems.  To speed it up, use the
                        (undocumented) _getpw{nam,uid}_shadow() routines.
                        Patch from Chris Thomas of UCLA/OAC Systems Group.
                SCO 5.x: include -lprot in the Makefile.  Patch from Bill
                        Glicker of Burrelle's Information Service.
                NEWS-OS 4.x: need a definition for MODE_T to compile.  Patch
                        from Makoto MATSUSHITA of Osaka University.
                SunOS 4.0.3: compile problems.  Patches from Andrew Cole of
                        Leeds University and SASABE Tetsuro of the University
                        of Tokyo.
                DG/UX 5.4.4.11 from Brian J. Murrell of InterLinx Support
                        Services, Inc.
                Domain/OS from Don (Truck) Lewis of TDK Semiconductor Corp.
                        I believe this to have only been a problem if you
                        compiled with -DUSE_VENDOR_CF_PATH -- another reason
                        to stick with /etc/sendmail.cf as your One True Path.
                Digital UNIX (OSF/1 on Alpha) load average computation from
                        Martin Laubach of the Technischen Universität Wien.
        CONFIG: change default Received: line to be multiple lines rather
                than one long one.  By popular demand.
        MAIL.LOCAL: warnings weren't being logged on some systems.  Patch
                from Jerome Berkman of U.C. Berkeley.
        MAKEMAP: be sure to zero hinfo to avoid cruft that can cause runs
                to take a very long time.  Problem noted by Yoshiro YONEYA
                of NTT Software Corporation.
        CONTRIB: add etrn.pl, contributed by John Beck.
        NEW FILES:
                contrib/etrn.pl

8.8.3/8.8.3     1996/11/17
        SECURITY: it was possible to get a root shell by lying to sendmail
                about argv[0] and then sending it a signal.  Problem noted
                by Leshka Zakharoff <leshka@leshka.chuvashia.su> on the
                best-of-security list.
        Log sendmail binary version number in "Warning: .cf version level
                (%d) exceeds program functionality (%d) message" -- this
                should make it clearer to people that they are running
                the wrong binary.
        Fix a problem that occurs when you open an SMTP connection and then
                do one or more ETRN commands followed by a MAIL command; at
                the end of the DATA phase sendmail would incorrectly report
                "451 SMTP-MAIL: lost child: No child processes".  Problem
                noted by Eric Bishop of Virginia Tech.
        When doing text-based host canonification (typically /etc/hosts
                lookup), a null host name would match any /etc/hosts entry
                with space at the end of the line.  Problem noted by Steve
                Hubert of the University of Washington, Seattle.
        7 to 8 bit BASE64 MIME conversions could duplicate bits of text.
                Problem reported by Tom Smith of Digital Equipment Corp.
        Increase the size of the DNS answer buffer -- the standard UDP packet
                size PACKETSZ (512) is not sufficient for some nameserver
                answers containing very many resource records.  The resolver
                may also switch to TCP and retry if it detects UDP packet
                overflow.  Also, allow for the fact that the resolver
                routines res_query and res_search return the size of the
                *un*truncated answer in case the supplied answer buffer it
                not big enough to accommodate the entire answer.  Patch from
                Eric Wassenaar.
        Improvements to MaxDaemonChildren code.  If you think you have too
                many children, probe the ones you have to verify that they
                are still around.  Suggested by Jared Mauch of CICnet, Inc.
                Also, do this probe before growing the vector of children
                pids; this previously caused the vector to grow indefinitely
                due to a race condition.  Problem reported by Kyle Jones of
                UUNET.
        On some architectures, <db.h> (from the Berkeley DB library) defines
                O_EXLOCK to zero; this fools the map compilation code into
                thinking that it can avoid race conditions by locking on open.
                Change it to check for O_EXLOCK non-zero.  Problem noted by
                Leif Erlingsson of Data Lege.
        Always call res_init() on startup (if compiled in, of course) to
                allow the sendmail.cf file to tweak resolver flags; without
                it, flag tweaks in ResolverOptions are ignored.  Patch from
                Andrew Sun of Merrill Lynch.
        Improvements to host status printing code.  Suggested by Steve Hubert
                of the University of Washington, Seattle.
        Change MinQueueAge option processing to do the check for the job age
                when reading the queue file, rather than at the end; this
                avoids parsing the addresses, which can do DNS lookups.
                Problem noted by John Beck of InReference, Inc.
        When MIME was being 7->8 bit decoded, "From " lines weren't being
                properly escaped.  Problem noted by Peter Nilsson of the
                University of Linkoping.
        In some cases, sendmail would retain root permissions during queue
                runs even if RunAsUser was set.  Problem noted by Mark
                Thomas of Mark G. Thomas Consulting.
        If the F=l flag was set on an SMTP mailer to indicate that it is
                actually local delivery, and NOTIFY=SUCCESS is specified in
                the envelope, and the receiving SMTP server speaks DSN, then
                the DSN would be both generated locally and propagated to the
                other end.
        The U= mailer field didn't correctly extract the group id if the
                user id was numeric.  Problem noted by Kenneth Herron of
                MCI Telecommunications Communications.
        If a message exceeded the fixed maximum size on input, the body of
                the message was included in the bounce.  Note that this did
                not occur if it exceeded the maximum _output_ size.  Problem
                reported by Kyle Jones of UUNET.
        PORTABILITY FIXES:
                AIX4: 4.1 doesn't have a working setreuid(2); change the
                        AIX4 defines to use seteuid(2) instead, which
                        works on 4.1 as well as 4.2.  Problem noted by
                        Håkan Lindholm of interAF, Sweden.
                AIX4: use tzname[] vector to determine time zone name.
                        Patch from NAKAMURA Motonori of Kyoto University.
                MkLinux: add Makefile.Linux.ppc and OSTYPE(mklinux) support.
                        Contributed by Paul DuBois <dubois@primate.wisc.edu>.
                Solaris: kstat(3k) support for retrieving the load average.
                        This adds the LA_KSTAT definition for LA_TYPE.
                        The outline of the implementation was contributed
                        by Michael Tokarev of Telecom Service, JSC, Moscow.
                HP-UX 10.0 gripes about the (perfectly legal!) forward
                        declaration of struct rusage at the top of conf.h;
                        change it to only be included if you are using gcc,
                        which is apparently the only compiler that requires
                        it in the first place.  Problem noted by Jeff
                        Earickson of Colby College.
                IRIX: don't default to using gcc.  IRIX is a civilized
                        operating system that comes with a decent compiler
                        by default.  Problem noted by Barry Bouwsma and
                        Kari Hurtta.
        CONFIG: specify F=9 as default in FEATURE(local_procmail) for
                consistency with other local mailers.  Inconsistency
                pointed out by Teddy Hogeborn <teddy@fukt.hk-r.se>.
        CONFIG: if the "limited best mx" feature is used (to reduce DNS
                overhead) as part of the bestmx_is_local feature, the
                domain part was dropped from the name.  Patch from Steve
                Hubert of the University of Washington, Seattle.
        CONFIG: catch addresses of the form "user@.dom.ain"; these could
                end up being translated to the null host name, which would
                return any entry in /etc/hosts that had a space at the end
                of the line.  Problem noted by Steve Hubert of the
                University of Washington, Seattle.
        CONFIG: add OSTYPE(aix4).  From Michael Sofka of Rensselaer
                Polytechnic Institute.
        MAKEMAP: tweak hash and btree parameters for better performance.
                Patch from Matt Dillon of Best Internet Communications.
        NEW FILES:
                src/Makefiles/Makefile.Linux.ppc
                cf/ostype/aix4.m4
                cf/ostype/mklinux.m4

8.8.2/8.8.2     1996/10/18
        SECURITY: fix a botch in the 7-bit MIME patch; the previous patch
                changed the code but didn't fix the problem.
        PORTABILITY FIXES:
                Solaris: Don't use the system getusershell(3); it can
                        apparently corrupt the heap in some circumstances.
                        Problem found by Ken Pizzini of Spry, Inc.
        OP.ME: document several mailer flags that were accidentally omitted
                from this document.  These flags were F=d, F=j, F=R, and F=9.
        CONFIG: no changes.

8.8.1/8.8.1     1996/10/17
        SECURITY: unset all environment variables that the resolver will
                examine during queue runs and daemon mode.  Problem noted
                by Dan Bernstein of the University of Illinois at Chicago.
        SECURITY: in some cases an illegal 7-bit MIME-encoded text/plain
                message could overflow a buffer if it was converted back
                to 8 bits.  This caused core dumps and has the potential
                for a remote attack.  Problem first noted by Gregory Shapiro
                of WPI.
        Avoid duplicate deliveries of error messages on systems that don't
                have flock(2) support.  Patch from Motonori Nakamura of
                Kyoto University.
        Ignore null FallBackMX (V) options.  If this option is null (as
                opposed to undefined) it can cause "null signature" syserrs
                on illegal host names.
        If a Base64 encoded text/plain message has no trailing newline in
                the encoded text, conversion back to 8 bits will drop the
                final line.  Problem noted by Pierre David.
        If running with a RunAsUser, sendmail would give bogus "cannot
                setuid" (or seteuid, or setreuid) messages on some systems.
                Problem pointed out by Jordan Mendelson of Web Services, Inc.
        Always print error messages in -bv mode -- previously, -bv would
                be absolutely silent on errors if the error mode was sent
                to (say) mail-back.  Problem noted by Kyle Jones of UUNET.
        If -qI/R/S is set (or the ETRN command is used), ignore all long
                term host status.  This is necessary because it is common
                to do this when you know a host has just come back up.
        Disallow duplicate HELO/EHLO commands as required by RFC 1651 section
                4.2.  Excessive permissiveness noted by Lee Flight of the
                University of Leicester.
        If a service (such as NIS) is specified as the last entry in the
                service switch, but that service is not compiled in, sendmail
                would return a temporary failure when an entry was not found
                in the map.  This caused the message to be queued instead of
                bouncing immediately.  Problem noted by Harry Edmon of the
                University of Washington.
        PORTABILITY FIXES:
                Solaris 2.3 had compilation problems in conf.c.  Several
                        people pointed this out.
                NetBSD from Charles Hannum of MIT.
                AIX4 improvements based on info from Steve Bauer of South
                        Dakota School of Mines & Technology.
        CONFIG: ``error:code message'' syntax was broken in virtusertable.
                Patch from Gil Kloepfer Jr.
        CONFIG: if FEATURE(nocanonify) was specified, hosts in $=M (set
                using MASQUERADE_DOMAIN) were not masqueraded unless they
                were also in $=w.  Problem noted by Zoltan Basti of
                Softec.
        MAIL.LOCAL: patches to compile and link cleanly on AIX.  Based
                on a patch from Eric Hagberg of Morgan Stanley.
        MAIL.LOCAL: patches to compile on NEXTSTEP.  From Patrick Nolan
                of Stanford via Robert La Ferla.

8.8.0/8.8.0     1996/09/26
        Under some circumstances, Bcc: headers would not be properly
                deleted.  Pointed out by Jonathan Kamens of OpenVision.
        Log a warning if the sendmail daemon is invoked without a full
                pathname, which prevents "kill -1" from working.  I was
                urged to put this in by Andrey A. Chernov of DEMOS (Russia).
        Fix small buffer overflow.  Since the data in this buffer was not
                read externally, there was no security problem (and in fact
                probably wouldn't really overflow on most compilers).  Pointed
                out by KIZU takashi of Osaka University.
        Fix problem causing domain literals such as [1.2.3.4] to be ignored
                if a FallbackMXHost was specified in the configuration file
                -- all mail would be sent to the fallback even if the original
                host was accessible.  Pointed out by Munenari Hirayama of
                NSC (Japan).
        A message that didn't terminate with a newline would (sometimes) not
                have the trailing "." added properly in the SMTP dialogue,
                causing SMTP to hang.  Patch from Per Hedeland of Ericsson.
        The DaemonPortOptions suboption to bind to a particular address was
                incorrect and nonfunctional due to a misunderstanding of the
                semantics of binding on a passive socket.  Patch from
                NIIBE Yutaka of Mitsubishi Research Institute.
        Increase the number of MX hosts for a single name to 100 to better
                handle the truly huge service providers such as AOL, which
                has 13 at the moment (and climbing).  In order to avoid
                trashing memory, the buffer for all names has only been
                slightly increased in size, to 12.8K from 10.2K -- this means
                that if a single name had 100 MX records, the average size
                of those records could not exceed 128 bytes.  Requested by
                Brad Knowles of America On Line.
        Restore use of IDENT returns where the OSTYPE field equals "OTHER".
                Urged by Dan Bernstein of U.C. Berkeley.
        Print q_statdate and q_specificity in address structure debugging
                printout.
        Expand MCI structure flag bits for debugging output.
        Support IPv6-style domain literals, which can have colons between
                square braces.
        Log open file descriptors for the "cannot dup" messages in deliver();
                this is an attempt to track down a bug that one person seems
                to be having (it may be a Solaris bug!).
        DSN NOTIFY parameters were not properly propagated across queue runs;
                this caused the NOTIFY info to sometimes be lost.  Problem
                pointed out by Claus Assmann of the
                Christian-Albrechts-University of Kiel.
        The statistics gathered in the sendmail.st file were too high; in
                some cases failures (e.g., user unknown or temporary failure)
                would count as a delivery as far as the statistics were
                concerned.  Problem noted by Tom Moore of AT&T GIS.
        Systems that don't have flock() would not send split envelopes in
                the initial run.  Problem pointed out by Leonard Zubkoff of
                Dandelion Digital.
        Move buffer overflow checking -- these primarily involve distrusting
                results that may come from NIS and DNS.
        4.4-BSD-derived systems, including FreeBSD, NetBSD, and BSD/OS didn't
                include <paths.h> and hence had the wrong pathnames for a few
                things like /var/tmp.  Reported by Matthew Green.
        Conditions were reversed for the Priority: header, resulting in all
                values being interpreted as non-urgent except for non-urgent,
                which was interpreted as normal.  Patch from Bryan Costales.
        The -o (optional) flag was being ignored on hash and btree maps
                since 8.7.2.  Fix from Bryan Costales.
        Content-Types listed in class "q" will always be encoded as
                Quoted-Printable (or more accurately, will never be encoded
                as base64).  The class can have primary types (e.g., "text")
                or full types (e.g., "text/plain").  Based on a suggestion by
                Marius Olafsson of the University of Iceland.
        Define ${envid} to be the original envelope id (from the ESMTP DSN
                dialogue) so it can be passed to programs in mailers.
        Define ${bodytype} to be the body type (from the -B flag or the
                BODY= ESMTP parameter) so it can be passed to programs in
                mailers.
        Cause the VRFY command to return 252 instead of 250 unless the F=q
                flag is set in the mailer descriptor.  Suggested by John
                Myers of CMU.
        Implement ESMTP ETRN command to flush the queue for a specific host.
                The command takes a host name; data for that host is
                immediately (and asynchronously) flushed.  Because this shares
                the -qR implementation, other hosts may be attempted, but
                there should be no security implications.  Implementation
                from John Beck of InReference, Inc.  See RFC 1985 for details.
        Add three new command line flags to pass in DSN parameters: -V envid
                (equivalent to ENVID=envid on the MAIL command), -R ret
                (equivalent to RET=ret on the MAIL command), and -Nnotify
                (equivalent to NOTIFY=notify on the RCPT command).  Note
                that the -N flag applies to all recipients; there is no way
                to specify per-address notifications on the command line,
                nor is there an equivalent for the ORCPT= per-address
                parameter.
        Restore LogLevel option to be safe (it can only be increased);
                apparently I went into paranoid mode between 8.6 and 8.7
                and made it unsafe.  Pointed out by Dabe Murphy of the
                University of Maryland.
        New logging on log level 15:  all SMTP traffic.  Patches from
                Andrew Gross of San Diego Supercomputer Center.
        NetInfo property value searching code wasn't stopping when it found
                a match.  This was causing the wrong values to be found (and
                had a memory leak).  Found by Bastian Schleuter of TU-Berlin.
        Add new F=0 (zero) mailer flag to turn off MX lookups.  It was pointed
                out by Bill Wisner of Electronics for Imaging that you can't
                use the bracket address form for the MAIL_HUB macro, since
                that causes the brackets to remain in the envelope recipient
                address used for delivery.  The simple fix (stripping off the
                brackets in the config file) breaks the use of IP literal
                addresses.  This flag will solve that problem.
        Add MustQuoteChars option.  This is a list of characters that must
                be quoted if they are found in the phrase part of an address
                (that is, the full name part).  The characters @,;:\()[] are
                always in this list and cannot be removed.  The default is
                this list plus . and ' to match RFC 822.
        Add AllowBogusHELO option; if set, sendmail will allow HELO commands
                that do not include a host name for back compatibility with
                some stupid SMTP clients.  Setting this violates RFC 1123
                section 5.2.5.
        Add MaxDaemonChildren option; if this is set, sendmail will start
                rejecting connections if it has more than this many
                outstanding children accepting mail.  Note that you may
                see more processes than this because of outgoing mail; this
                is for incoming connections only.
        Add ConnectionRateThrottle option.  If set to a positive value, the
                number of incoming SMTP connections that will be permitted
                in a single second is limited to this number.  Connections are
                not refused during this time, just deferred.  The intent is to
                flatten out demand so that load average limiting can kick in.
                It is less radical than MaxDaemonChildren, which will stop
                accepting connections even if all the connections are idle
                (e.g., due to connection caching).
        Add Timeout.hoststatus option.  This interval (defaulting to 30m)
                specifies how long cached information about the state of a
                host will be kept before they are considered stale and the
                host is retried.  If you are using persistent host status
                (i.e., the HostStatusDirectory option is set) this will apply
                between runs; otherwise, it applies only within a single queue
                run and hence is useful only for hosts that have large queues
                that take a very long time to run.
        Add SingleLineFromHeader option.  If set, From: headers are coerced
                into being a single line even if they had newlines in them
                when read.  This is to get around a botch in Lotus Notes.
        Text class maps were totally broken -- if you ever retrieved the last
                item in a table it would be truncated.  Problem noted by
                Gregory Neil Shapiro of WPI.
        Extend the lines printed by the mailq command (== the -bp flag) when
                -v is given to 120 characters; this allows more information
                to be displayed.  Suggested by Gregory Neil Shapiro of WPI.
        Allow macro definitions (`D' lines) with unquoted commas; previously
                this was treated as end-of-input.  Problem noted by Bryan
                Costales.
        The RET= envelope parameter (used for DSNs) wasn't properly written
                to the queue file.  Fix from John Hughes of Atlantic
                Technologies, Inc.
        Close /var/tmp/dead.letter after a successful write -- otherwise
                if this happens in a queue run it can cause nasty delays.
                Problem noted by Mark Horton of AT&T.
        If userdb entries pointed to userdb entries, and there were multiple
                values for a given key, the database cursor would get
                trashed by the recursive call.  Problem noted by Roy Mongiovi
                of Georgia Tech.  Fixed by reading all the values and creating
                a comma-separated list; thus, the -v output will be somewhat
                different for this case.
        Fix buffer allocation problem with Hesiod-based userdb maps when
                HES_GETMAILHOST is defined.  Based on a patch by Betty Lee
                of Stanford University.
        When envelopes were split due to aliases with owner- aliases, and
                there was some error on one of the lists, more than one of
                the owners would get the message.  Problem pointed out by
                Roy Mongiovi of Georgia Tech.
        Detect excessive recursion in macro expansions, e.g., $X defined
                in terms of $Y which is defined in terms of $X.  Problem
                noted by Bryan Costales; patch from Eric Wassenaar.
        When using F=U to get "ugly UUCP" From_ lines, a buffer could in
                some cases get trashed causing bogus From_ lines.  Fix from
                Kyle Jones of UUNET.
        When doing load average initialization, if the nlist call for avenrun
                failed, the second and subsequent lookups wouldn't notice
                that fact causing bogus load averages to be returned.  Noted
                by Casper Dik of Sun Holland.
        Fix problem with incompatibility with some versions of inet_aton that
                have changed the return value to unsigned, so a check for an
                error return of -1 doesn't work.  Use INADDR_NONE instead.
                This could cause mail to addresses such as [foo.com] to bounce
                or get dropped.  Problem noted by Christophe Wolfhugel of the
                Pasteur Institute.
        DSNs were inconsistent if a failure occurred during the DATA phase
                rather than the RCPT phase: the Action: would be correct, but
                the detailed status information would be wrong.  Problem noted
                by Bob Snyder of General Electric Company.
        Add -U command line flag and the XUSR ESMTP extension, both indicating
                that this is the initial MUA->MTA submission.  The flag current
                does nothing, but in future releases (when MUAs start using
                these flags) it will probably turn on things like DNS
                canonification.
        Default end-of-line string (E= specification on mailer [M] lines)
                to \r\n on SMTP mailers.  Default remains \n on non-SMTP
                mailers.
        Change the internal definition for the *file* and *include* mailers
                to have $u in the argument vectors so that they aren't
                misinterpreted as SMTP mailers and thus use \r\n line
                termination.  This will affect anyone who has redefined
                either of these in their configuration file.
        Don't assume that IDENT servers close the connection after a query;
                responses can be newline terminated.  From Terry Kennedy of
                St. Peter's College.
        Avoid core dumps on erroneous configuration files that have
                $#mailer with nothing following.  From Bryan Costales.
        Avoid null pointer dereference with high debug values in unlockqueue.
                Fix from Randy Martin of Clemson University.
        Fix possible buffer overrun when expanding very large macros.  Fix
                from Kyle Jones of UUNET.
        After 25 EXPN or VRFY commands, start pausing for a second before
                processing each one.  This avoids a certain form of denial
                of service attack.  Potential attack pointed out by Bryan
                Costales.
        Allow new named (not numbered!) config file rules to do validity
                checking on SMTP arguments: check_mail for MAIL commands and
                check_rcpt for RCPT commands.  These rulesets can do anything
                they want; their result is ignored unless they resolve to the
                $#error mailer, in which case the indicated message is printed
                and the command is rejected.  Similarly, the check_compat
                ruleset is called before delivery with "from_addr $| to_addr"
                (the $| is a meta-symbol used to separate the two addresses);
                it can give a "this sender can't send to this recipient"
                notification.  Note that this patch allows $| to stand alone
                in rulesets.
        Define new macros ${client_name}, ${client_addr}, and ${client_port}
                that have the name, IP address, and port number (respectively)
                of the SMTP client (that is, the entity at the other end of
                the connection.  These can be used in (e.g.) check_rcpt to
                verify that someone isn't trying to relay mail through your
                host inappropriately.  Be sure to use the deferred evaluation
                form, for example $&{client_name}, to avoid having these bound
                when sendmail reads the configuration file.
        Add new config file rule check_relay to check the incoming connection
                information.  Like check_compat, it is passed the host name
                and host address separated by $| and can reject connections
                on that basis.
        Allow IDA-style recursive function calls.  Code contributed by Mark
                Lovell and Paul Vixie.
        Eliminate the "No ! in UUCP From address!" message" -- instead, create
                a virtual UUCP address using either a domain address or the $k
                macro.  Based on code contributed by Mark Lovell and Paul
                Vixie.
        Add Stanford LDAP map.  Requires special libraries that are not
                included with sendmail.  Contributed by Booker C. Bense
                <bbense@networking.stanford.edu>; contact him for support.
                See also the src/READ_ME file.
        Allow -dANSI to turn on ANSI escape sequences in debug output; this
                puts metasymbols (e.g., $+) in reverse video.  Really useful
                only for debugging deep bits of code where it is important to
                distinguish between the single-character metasymbol $+ and the
                two characters $, +.
        Changed ruleset 89 (executed in dumpstate()) to a named ruleset,
                debug_dumpstate.
        Add new UnsafeGroupWrites option; if set, .forward and :include:
                files that are group writable are considered "unsafe" -- that
                is, programs and files referenced from such files are not
                valid recipients.
        Delete bogosity test for FallBackMX host; this prevented it to be a
                name that was not in DNS or was a domain-literal.  Problem
                noted by Tom May.
        Change the introduction to error messages to more clearly delineate
                permanent from temporary failures; if both existed in a
                single message it could be confusing.  Suggested by John
                Beck of InReference, Inc.
        The IngoreDot (i) option didn't work for lines that were terminated
                with CRLF.  Problem noted by Ted Stockwell of Secure
                Computing Corporation.
        Add a heuristic to improve the handling of unbalanced `<' signs in
                message headers.  Problem reported by Matt Dillon of Best
                Internet Communications.
        Check for bogus characters in the 0200-0237 range; since these are
                used internally, very strange errors can occur if those
                characters appear in headers.  Problem noted by Anders Gertz
                of Lysator.
        Implement 7 -> 8 bit MIME conversions.  This only takes place if the
                recipient mailer has the F=9 flag set, and only works on
                text/plain body types.  Code contributed by Marius Olafsson
                of the University of Iceland.
        Special case "postmaster" name so that it is always treated as lower
                case in alias files regardless of configuration settings;
                this prevents some potential problems where "Postmaster" or
                "POSTMASTER" might not match "postmaster".  In most cases
                this change is a no-op.
        The -o map flag was ignored for text maps.  Problem noted by Bryan
                Costales.
        The -a map flag was ignored for dequote maps.  Problem noted by
                Bryan Costales.
        Fix core dump when a lookup of a class "prog" map returns no
                response.  Patch from Bryan Costales.
        Log instances where sendmail is deferring or rejecting connections
                on LogLevel 14.  Suggested by Kyle Jones of UUNET.
        Include port number in process title for network daemons.  Suggested
                by Kyle Jones of UUNET.
        Send ``double bounces'' (errors that occur when sending an error
                message) to the address indicated in the DoubleBounceAddress
                option (default: postmaster).  Previously they were always
                sent to postmaster.  Suggested by Kyle Jones of UUNET.
        Add new mode, -bD, that acts like -bd in all respects except that
                it runs in foreground.  This is useful for using with a
                wrapper that "watches" system services.  Suggested by Kyle
                Jones of UUNET.
        Fix botch in spacing around (parenthesized) comments in addresses
                when the comment comes before the address.  Patch from
                Motonori Nakamura of Kyoto University.
        Use the prefix "Postmaster notify" on the Subject: lines of messages
                that are being bounced to postmaster, rather than "Returned
                mail".  This permits the person who is postmaster more
                easily determine what messages are to their role as
                postmaster versus bounces to mail they actually sent.  Based
                on a suggestion by Motonori Nakamura.
        Add new value "time" for QueueSortOrder option; this causes the queue
                to be sorted strictly by the time of submission.  Note that
                this can cause very bad behavior over slow lines (because
                large jobs will tend to delay small jobs) and on nodes with
                heavy traffic (because old things in the queue for hosts that
                are down delay processing of new jobs).  Also, this does not
                guarantee that jobs will be delivered in submission order
                unless you also set DeliveryMode=queue.  In general, it should
                probably only be used on the command line, and only in
                conjunction with -qRhost.domain.  In fact, there are very few
                cases where it should be used at all.  Based on an
                implementation by Motonori Nakamura.
        If a map lookup in ruleset 5 returns tempfail, queue the message in
                the same manner as other rulesets.  Previously a temporary
                failure in ruleset 5 was ignored.  Patch from Booker Bense
                of Stanford University.
        Don't proceed to the next MX host if an SMTP MAIL command returns a
                5yz (permanent failure) code.  The next MX host will still be
                tried if the connection cannot be opened in the first place
                or if the MAIL command returns a 4yz (temporary failure) code.
                (It's hard to know what to do here, since neither RFC 974 nor
                RFC 1123 specify when to proceed to the next MX host.)
                Suggested by Jonathan Kamens of OpenVision, Inc.
        Add new "-t" flag for map definitions (the "K" line in the .cf file).
                This causes map lookups that get a temporary failure (e.g.,
                name server failure) to _not_ defer the delivery of the
                message.  This should only be used if your configuration file
                is prepared to do something sensible in this case.  Based on
                an idea by Gregory Shapiro of WPI.
        Fix problem finding network interface addresses.  Patch from
                Motonori Nakamura.
        Don't reject qf entries that are not owned by your effective uid if
                you are not running set-user-ID; this makes management of
                certain kinds of firewall setups difficult.  Patch
                suggested by Eamonn Coleman of Qualcomm.
        Add persistent host status.  This keeps the information normally
                maintained within a single queue run in disk files that are
                shared between sendmail instances.  The HostStatusDirectory
                is the directory in which the information is maintained.  If
                not set, persistent host status is turned off.  If not a full
                pathname, it is relative to the queue directory.  A common
                value is ".hoststat".
                There are also two new operation modes:
                  * -bh prints the status of hosts that have had recent
                    connections.
                  * -bH purges the host statuses.  No attempt is made to save
                    recent status information.
                This feature was originally written by Paul Vixie of Vixie
                Enterprises for KJS and adapted for V8 by Mark Lovell of
                Bigrock Consulting.  Paul's funding of Mark and Mark's patience
                with my insistence that things fit cleanly into the V8
                framework is gratefully appreciated.
        New SingleThreadDelivery option (requires HostStatusDirectory to
                operate).  Avoids letting two sendmails on the local machine
                open connections to the same remote host at the same time.
                This reduces load on the other machine, but can cause mail to
                be delayed (for example, if one sendmail is delivering a huge
                message, other sendmails won't be able to send even small
                messages).  Also, it requires another file descriptor (for the
                lock file) per connection, so you may have to reduce
                ConnectionCacheSize to avoid running out of per-process
                file descriptors.  Based on the persistent host status code
                contributed by Paul Vixie and Mark Lovell.
        Allow sending to non-simple files (e.g., /dev/null) even if the
                SafeFileEnvironment option is set.  Problem noted by Bryan
                Costales.
        The -qR flag mistakenly matched flags in the "R" line of the queue
                file.  Problem noted by Bryan Costales.
        If a job was aborted using the interrupt signal (e.g., control-C from
                the keyboard), on some occasions an empty df file would be
                left around; these would collect in the queue directory.
                Problem noted by Bryan Costales.
        Change the makesendmail script to enhance the search for Makefiles
                based on release number.  For example, on SunOS 5.5.1, it will
                search for Makefile.SunOS.5.5.1, Makefile.SunOS.5.5, and then
                Makefile.SunOS.5.x (in addition to the other rules, e.g.,
                adding $arch).  Problem noted by Jason Mastaler of Atlanta
                Webmasters.
        When creating maps using "newaliases", always map the keys to lower
                case when creating the map unless the -f flag is specified on
                the map itself.  Previously this was done based on the F=u
                flag in the local mailer, which meant you could create aliases
                that you could never access.  Problem noted by Bob Wu of DEC.
        When a job was read from the queue, the bits causing notification on
                failure or delay were always set.  This caused those
                notifications to be sent even if NOTIFY=NEVER had been
                specified.  Problem noted by Steve Hubert of the University
                of Washington, Seattle.
        Add new configurable routine validate_connection (in conf.c).  This
                lets you decide if you are willing to accept traffic from
                this host.  If it returns FALSE, all SMTP commands will return
                "550 Access denied".  -DTCPWRAPPERS will include support for
                TCP wrappers; you will need to add -lwrap to the link line.
                (See src/READ_ME for details.)
        Don't include the "THIS IS A WARNING MESSAGE ONLY" banner on postmaster
                bounces.  Some people seemed to think that this could be
                confusing (even though it is true).  Suggested by Motonori
                Nakamura.
        Add new RunAsUser option; this causes sendmail to do a setuid to that
                user early in processing to avoid potential security problems.
                However, this means that all .forward and :include: files must
                be readable by that user, and all files to be written must be
                writable by that user and all programs will be executed by that
                user.  It is also incompatible with the SafeFileEnvironment
                option.  In other words, it may not actually add much to
                security.  However, it should be useful on firewalls and other
                places where users don't have accounts and the aliases file is
                well constrained.
        Add Timeout.iconnect.  This is like Timeout.connect except it is used
                only on the first attempt to delivery to an address.  It could
                be set to be lower than Timeout.connect on the principle that
                the mail should go through quickly to responsive hosts; less
                responsive hosts get to wait for the next queue run.
        Fix a problem on Solaris that occasionally causes programs
                (such as vacation) to hang with their standard input connected
                to a UDP port.  It also created some signal handling problems.
                The problems turned out to be an interaction between vfork(2)
                and some of the libraries, particularly NIS/NIS+.  I am
                indebted to Tor Egge <tegge@idt.ntnu.no> for this fix.
        Change user class map to do the same matching that actual delivery
                will do instead of just a /etc/passwd lookup.  This adds
                fuzzy matching to the user map.  Patch from Dan Oscarsson.
        The Timeout.* options are not safe -- they can be used to create a
                denial-of-service attack.  Problem noted by Christophe
                Wolfhugel.
        Don't send PostmasterCopy messages in the event of a "delayed"
                notification.  Suggested by Barry Bouwsma.
        Don't advertise "VERB" ESMTP extension if the "noexpn" privacy
                option is set, since this disables VERB mode.  Suggested
                by John Hawkinson of MIT.
        Complain if the QueueDirectory (Q) option is not set.  Problem noted
                by Motonori Nakamura of Kyoto University.
        Only queue messages on transient .forward open failures if there
                were no successful opens.  The previous behavior caused it
                to queue even if a "fall back" .forward was found.  Problem
                noted by Ann-Kian Yeo of the Dept. of Information Systems
                and Computer Science (DISCS), NUS, Singapore.
        Don't do 8->7 bit conversions when bouncing a MIME message that
                is bouncing because of a MIME error during 8->7 bit conversion;
                the encapsulated message will bounce again, causing a loop.
                Problem noted by Steve Hubert of the University of Washington.
        Create xf (transcript) files using the TempFileMode option value
                instead of 0644.  Suggested by Ann-Kian Yeo of the
                National University of Singapore.
        Print errors if setgid/setuid/etc. fail during delivery.  This helps
                detect cases where DefaultUid is set to something that the
                system can't cope with.
        PORTABILITY FIXES:
                Support for AIX/RS 2.2.1 from Mark Whetzel of Western
                        Atlas International.
                Patches for Intel Paragon OSF/1 1.3 from Leo Bicknell
                        <bicknell@ufp.org>.
                On DEC OSF/1 3.2 and earlier, the MatchGECOS code would only
                        work on the first recipient of a message due to a
                        bug in the getpwent family.  If this is something you
                        use, you can define DEC_OSF_BROKEN_GETPWENT=1 for a
                        workaround.  From Maximum Entropy of Sanford C.
                        Bernstein and Associates.
                FreeBSD 1.1.5.1 uname -r returns a string containing
                        parentheses, which breaks makesendmail.  Reported
                        by Piero Serini <piero@strider.ibenet.it>.
                Sequent DYNIX/ptx 4.0.2 patches from Jack Woolley of
                        Systems and Computer Technology Corporation.
                Solaris 2.x: omit the UUCP grade parameter (-g flag) because
                        it is system-dependent.  Problem noted by J.J. Bailey
                        of Bailey Computer Consulting.
                Pyramid NILE running DC/OSx support from Earle F. Ake of
                        Hassler Communication Systems Technology, Inc.
                HP-UX 10.x compile glitches, reported by Anne Brink of the
                        U.S. Army and James Byrne of Harte & Lyne Limited.
                NetBSD from Matthew Green of the NetBSD crew.
                SCO 5.x from Keith Reynolds of SCO.
                IRIX 6.2 from Robert Tarrall of the University of
                        Colorado and Kari Hurtta of the Finnish Meteorological
                        Institute.
                UXP/DS (Fujitsu/ICL DS/90 series) support from Diego R.
                        Lopez, CICA (Seville).
                NCR SVR4 MP-RAS 3.x support from Tom Moore of NCR.
                PTX 3.2.0 from Kenneth Stailey of the US Department of Labor
                        Employment Standards Administration.
                Altos System V (5.3.1) from Tim Rice of Multitalents.
                Concurrent Systems Corporation Maxion from Donald R. Laster
                        Jr.
                NetInfo maps (improved debugging and multi-valued aliases)
                        from Adrian Steinmann of Steinmann Consulting.
                ConvexOS 11.5 (including SecureWare C2 and the Share Scheduler)
                        from Eric Schnoebelen of Convex.
                Linux 2.0 mail.local patches from Horst von Brand.
                NEXTSTEP 3.x compilation from Robert La Ferla.
                NEXTSTEP 3.x code changes from Allan J. Nathanson of NeXT.
                Solaris 2.5 configuration fixes for mail.local by Jim Davis
                        of the University of Arizona.
                Solaris 2.5 has a working setreuid.  Noted by David Linn of
                        Vanderbilt University.
                Solaris changes for praliases, makemap, mailstats, and smrsh.
                        Previously you had to add -DSOLARIS in Makefile.dist;
                        this auto-detects.  Based on a patch from Randall
                        Winchester of the University of Maryland.
        CONFIG: add generic-nextstep3.3.mc file.  Contributed by
                Robert La Ferla of Hot Software.
        CONFIG: allow mailertables to resolve to ``error:code message''
                (where "code" is an exit status) on domains (previously
                worked only on hosts).  Patch from Cor Bosman of Xs4all
                Foundation.
        CONFIG: hooks for IPv6-style domain literals.
        CONFIG: predefine ALIAS_FILE and change the prototype file so that
                if it is undefined the AliasFile option is never set; this
                should be transparent for most everyone.  Suggested by John
                Myers of CMU.
        CONFIG: add FEATURE(limited_masquerade).  Without this feature, any
                domain listed in $=w is masqueraded.  With it, only those
                domains listed in a MASQUERADE_DOMAIN macro are masqueraded.
        CONFIG: add FEATURE(masquerade_entire_domain).  This causes
                masquerading specified by MASQUERADE_DOMAIN to apply to all
                hosts under those domains as well as the domain headers
                themselves.  For example, if a configuration had
                MASQUERADE_DOMAIN(foo.com), then without this feature only
                foo.com would be masqueraded; with it, *.foo.com would be
                masqueraded as well.  Based on an implementation by Richard
                (Pug) Bainter of U. Texas.
        CONFIG: add FEATURE(genericstable) to do a more general rewriting of
                outgoing addresses.  Defaults to ``hash -o /etc/genericstable''.
                Keys are user names; values are outgoing mail addresses.  Yes,
                this does overlap with the user database, and figuring out
                just when to use which one may be tricky.  Based on code
                contributed by Richard (Pug) Bainter of U. Texas with updates
                from Per Hedeland of Ericsson.
        CONFIG: add FEATURE(virtusertable) to do generalized rewriting of
                incoming addresses.  Defaults to ``hash -o /etc/virtusertable''.
                Keys are either fully qualified addresses or just the host
                part (with the @ sign).  For example, a table containing:
                        info@foo.com    foo-info
                        info@bar.com    bar-info
                        @baz.org        jane@elsewhere.net
                would send all mail destined for info@foo.com to foo-info
                (which is presumably an alias), mail addressed to info@bar.com
                to bar-info, and anything addressed to anyone at baz.org will
                be sent to jane@elsewhere.net.  The names foo.com, bar.com,
                and baz.org must all be in $=w.  Based on discussions with
                a great many people.
        CONFIG: add nullclient configurations to define SMTP_MAILER_FLAGS.
                Suggested by Richard Bainter.
        CONFIG: add FAX_MAILER_ARGS to tweak the arguments passed to the
                "fax" mailer.
        CONFIG: allow mailertable entries to resolve to local:user; this
                passes the original user@host in to procmail-style local
                mailers as the "detail" information to allow them to do
                additional clever processing.  From Joe Pruett of
                Teleport Corporation.  Delivery to the original user can
                be done by specifying "local:" (with nothing after the colon).
        CONFIG: allow any context that takes "mailer:domain" to also take
                "mailer:user@domain" to force mailing to the given user;
                "local:user" can also be used to do local delivery.  This
                applies on *_RELAY and in the mailertable entries.  Based
                on a suggestion by Ribert Kiessling of Easynet.
        CONFIG: Allow FEATURE(bestmx_is_local) to take an argument that
                limits the possible domains; this reduces the number of DNS
                lookups required to support this feature.  For example,
                FEATURE(bestmx_is_local, my.site.com) limits the lookups
                to domains under my.site.com.  Code contributed by Anthony
                Thyssen <anthony@cit.gu.edu.au>.
        CONFIG: LOCAL_RULESETS introduces any locally defined rulesets,
                such as the check_rcpt ruleset.  Suggested by Gregory Shapiro
                of WPI.
        CONFIG: MAILER_DEFINITIONS introduces any mailer definitions, in the
                event you have to define local mailers.  Suggested by
                Gregory Shapiro of WPI.
        CONFIG: fix cases where a three- (or more-) stage route-addr could
                be misinterpreted as a list:...; syntax.  Based on a patch by
                Vlado Potisk <Vlado_Potisk@tempest.sk>.
        CONFIG: Fix masquerading of UUCP addresses when the UUCP relay is
                remotely connected.  The address host!user was being
                converted to host!user@thishost instead of host!user@uurelay.
                Problem noted by William Gianopoulos of Raytheon Company.
        CONFIG: add confTO_ICONNECT to set Timeout.iconnect.
        CONFIG: change FEATURE(redirect) message from "User not local" to
                "User has moved"; the former wording was confusing if the
                new address is still on the local host.  Based on a suggestion
                by Andreas Luik.
        CONFIG: add support in FEATURE(nullclient) for $=E (exposed users).
                However, the class is not pre-initialized to contain root.
                Suggested by Gregory Neil Shapiro.
        CONTRIB: Remove XLA code at the request of the author, Christophe
                Wolfhugel.
        CONTRIB: Add re-mqueue.pl, contributed by Paul Pomes of Qualcomm.
        MAIL.LOCAL: make it possible to compile mail.local on Solaris.  Note
                well: this produces a slightly different mailbox format (no
                Content-Length: headers), file ownerships and modes are
                different (not owned by group mail; mode 600 instead of 660),
                and the local mailer flags will have to be tweaked (make them
                match bsd4.4) in order to use this mailer.  Patches from Paul
                Hammann of the Missouri Research and Education Network.
        MAIL.LOCAL: in some cases it could return EX_OK even though there
                was a delivery error, such as if the ownership on the file
                was wrong or the mode changed between the initial stat and
                the open.  Problem reported by William Colburn of the New
                Mexico Institute of Mining and Technology.
        MAILSTATS: handle zero length files more reliably.  Patch from Bryan
                Costales.
        MAILSTATS: add man page contributed by Keith Bostic of BSDI.
        MAKEMAP: The -d flag (to allow duplicate keys) to a btree map wasn't
                honored.  Fix from Michael Scott Shappe.
        PRALIASES: add man page contributed by Keith Bostic of BSDI.
        NEW FILES:
                src/Makefiles/Makefile.AIX.2
                src/Makefiles/Makefile.IRIX.6.2
                src/Makefiles/Makefile.maxion
                src/Makefiles/Makefile.NCR.MP-RAS.3.x
                src/Makefiles/Makefile.SCO.5.x
                src/Makefiles/Makefile.UXPDSV20
                mailstats/mailstats.8
                praliases/praliases.8
                cf/cf/generic-nextstep3.3.mc
                cf/feature/genericstable.m4
                cf/feature/limited_masquerade.m4
                cf/feature/masquerade_entire_domain.m4
                cf/feature/virtusertable.m4
                cf/ostype/aix2.m4
                cf/ostype/altos.m4
                cf/ostype/maxion.m4
                cf/ostype/solaris2.ml.m4
                cf/ostype/uxpds.m4
                contrib/re-mqueue.pl
        DELETED FILES:
                src/Makefiles/Makefile.Solaris
                contrib/xla/README
                contrib/xla/xla.c
        RENAMED FILES:
                src/Makefiles/Makefile.NCR3000 =>       Makefile.NCR.MP-RAS.2.x
                src/Makefiles/Makefile.SCO.3.2v4.2 =>   Makefile.SCO.4.2
                src/Makefiles/Makefile.UXPDS =>         Makefile.UXPDSV10
                src/Makefiles/Makefile.NeXT =>          Makefile.NeXT.2.x
                src/Makefiles/Makefile.NEXTSTEP =>      Makefile.NeXT.3.x

8.7.6/8.7.3     1996/09/17
        SECURITY: It is possible to force getpwuid to fail when writing the
                queue file, causing sendmail to fall back to running programs
                as the default user.  This is not exploitable from off-site.
                Workarounds include using a unique user for the DefaultUser
                (old u & g options) and using smrsh as the local shell.
        SECURITY: fix some buffer overruns; in at least one case this allows
                a local user to get root.  This is not known to be exploitable
                from off-site.  The workaround is to disable chfn(1) commands.

8.7.5/8.7.3     1996/03/04
        Fix glitch in 8.7.4 when putting certain internal lines; this can
                in some case cause connections to hang or messages to have
                extra spaces in odd places.  Patch from Eric Wassenaar;
                reports from Eric Hall of Chiron Corporation, Stephen
                Hansen of Stanford University, Dean Gaudet of HotWired,
                and others.

8.7.4/8.7.3     1996/02/18
        SECURITY: In some cases it was still possible for an attacker to
                insert newlines into a queue file, thus allowing access to
                any user (except root).
        CONFIG: no changes -- it is not a bug that the configuration
                version number is unchanged.

8.7.3/8.7.3     1995/12/03
        Fix botch in name server timeout in RCPT code; this problem caused
                two responses in SMTP, which breaks things horribly.  Fix
                from Gregory Neil Shapiro of WPI.
        Verify that L= value on M lines cannot be negative, which could cause
                negative array subscripting.  Not a security problem since
                this has to be in the config file, but it could have caused
                core dumps.  Pointed out by Bryan Costales.
        Fix -d21 debug output for long macro names.  Pointed out by Bryan
                Costales.
        PORTABILITY FIXES:
                SCO doesn't have ftruncate.  From Bill Aten of Computerizers.
                IBM's version of arpa/nameser.h defaults to the wrong byte
                        order.  Tweak it to work properly.  Based on fixes
                        from Fletcher Mattox of UTexas and Betty Lee of
                        Stanford University.
        CONFIG: add confHOSTS_FILE m4 variable to set HostsFile option.
                Deficiency pointed out by Bryan Costales of ICSI.

8.7.2/8.7.2     1995/11/19
        REALLY fix the backslash escapes in SmtpGreetingMessage,
                OperatorChars, and UnixFromLine options.  They were not
                properly repaired in 8.7.1.
        Completely delete the Bcc: header if and only if there are other
                valid recipient headers (To:, Cc: or Apparently-To:, the
                last being a historic botch, of course).  If Bcc: is the
                only recipient header in the message, its value is tossed,
                but the header name is kept.  The old behavior (always keep
                the header name and toss the value) allowed primary recipients
                to see that a Bcc: went to _someone_.
        Include queue id on ``Authentication-Warning: <host>: <user> set
                sender to <address> using -f'' syslog messages.  Suggested
                by Kari Hurtta.
        If a sequence or switch map lookup entry gets a tempfail but then
                continues on to another map type, but the name is not found,
                return a temporary failure from the sequence or switch map.
                For example, if hosts search ``dns files'' and DNS fails
                with a tempfail, the hosts map will go on and search files,
                but if it fails the whole thing should be a tempfail, not
                a permanent (host unknown) failure, even though that is the
                failure in the hosts.files map.  This error caused hard
                bounces when it should have requeued.
        Aliases to files such as /users/bar/foo/inbox, with /users/bar/foo
                owned by bar mode 700 and inbox being set-user-ID bar stopped
                working properly due to excessive paranoia.  Pointed out by
                John Hawkinson of Panix.
        An SMTP RCPT command referencing a host that gave a nameserver
                timeout would return a 451 command (8.6 accepted it and
                queued it locally).  Revert to the 8.6 behavior in order
                to simplify queue management for clustered systems.  Suggested
                by Gregory Neil Shapiro of WPI.  The same problem could break
                MH, which assumes that the SMTP session will succeed (tsk, tsk
                -- mail gets lost!); this was pointed out by Stuart Pook of
                Infobiogen.
        Fix possible buffer overflow in munchstring().  This was not a security
                problem because you couldn't specify any argument to this
                without first giving up root privileges, but it is still a
                good idea to avoid future problems.  Problem noted by John
                Hawkinson and Sam Hartman of MIT.
        ``452 Out of disk space for temp file'' messages weren't being
                printed.  Fix from David Perlin of Nanosoft.
        Don't advertise the ESMTP DSN extension if the SendMimeErrors option
                is not set, since this is required to get the actual DSNs
                created.  Problem pointed out by John Gardiner Myers of CMU.
        Log permission problems that cause .forward and :include: files to
                be untrusted or ignored on log level 12 and higher.  Suggested
                by Randy Martin of Clemson University.
        Allow user ids in U= clauses of M lines to have hyphens and
                underscores.
        Fix overcounting of recipients -- only happened when sending to an
                alias.  Pointed out by Mark Andrews of SGI and Jack Woolley
                of Systems and Computer Technology Corporation.
        If a message is sent to an address that fails, the error message that
                is returned could show some extraneous "success" information
                included even if the user did not request success notification,
                which was confusing.  Pointed out by Allan Johannesen of WPI.
        Config files that had no AliasFile definition were defaulting to
                using /etc/aliases; this caused problems with nullclient
                configurations.  Change it back to the 8.6 semantics of
                having no local alias file unless it is declared.  Problem
                noted by Charles Karney of Princeton University.
        Fix compile problem if NOTUNIX is defined.  Pointed out by Bryan
                Costales of ICSI.
        Map lookups of class "userdb" maps were always case sensitive; they
                should be controlled by the -f flag like other maps.  Pointed
                out by Bjart Kvarme <bjart.kvarme@usit.uio.no>.
        Fix problem that caused some addresses to be passed through ruleset 5
                even when they were tagged as "sticky" by prefixing the
                address with an "@".  Patch from Thomas Dwyer III of Michigan
                Technological University.
        When converting a message to Quoted-Printable, prevent any lines with
                dots alone on a line by themselves.  This is because of the
                preponderance of broken mailers that still get this wrong.
                Code contributed by Per Hedeland of Ericsson.
        Fix F{macro}/file construct -- it previously did nothing.  Pointed
                out by Bjart Kvarme of USIT/UiO (Norway).
        Announce whether a cached connection is SMTP or ESMTP (in -v mode).
                Requested by Allan Johannesen.
        Delete check for text format of alias files -- it should be legal
                to have the database format of the alias files without the
                text version.  Problem pointed out by Joe Rhett of Navigist,
                Inc.
        If "Ot" was specified with no value, the TZ variable was not properly
                imported from the environment.  Pointed out by Frank Crawford
                <frank@ansto.gov.au>.
        Some architectures core dumped on "program" maps that didn't have
                extra arguments.  Patch from Booker C. Bense of Stanford
                University.
        Queue run processes would re-spawn daemons when given a SIGHUP; only
                the parent should do this.  Fix from Brian Coan of the
                Association for Progressive Communications.
        If MinQueueAge was set and a message was considered but not run
                during a queue run and the Timeout.queuereturn interval was
                reached, a "timed out" error message would be returned that
                didn't include the failed address (and claimed to be a warning
                even though it was fatal).  The fix is to not return such
                messages until they are actually tried, i.e., in the next
                MinQueueAge interval.  Problem noted by Rein Tollevik of
                SINTEF RUNIT, Oslo.
        Add HES_GETMAILHOST compile flag to support MIT Hesiod distributions
                that have the hes_getmailhost() routine.  DEC Hesiod
                distributions do not have this routine.  Based on a patch
                from Betty Lee of Stanford University.
        Extensive cleanups to map open code to handle a locking race condition
                in ndbm, hash, and btree format database files on some (most
                non-4.4-BSD based) OS architectures.  This should solve the
                occasional "user unknown" problem during alias rebuilds that
                has plagued me for quite some time.  Based on a patch from
                Thomas Dwyer III of Michigan Technological University.
        PORTABILITY FIXES:
                Solaris: Change location of newaliases and mailq from
                        /usr/ucb to /usr/bin to match Sun settings.  From
                        James B. Davis of TCI.
                DomainOS: Makefile.DomainOS doesn't require -ldbm.  From
                        Don Lewis of Silicon Systems.
                HP-UX 10: rename Makefile.HP-UX.10 => Makefile.HP-UX.10.x
                        so that the makesendmail script will find it.  Pointed
                        out by Richard Allen of the University of Iceland.
                        Also, use -Aa -D_HPUX_SOURCE instead of -Ae, which
                        isn't supported on all compilers.
                UXPDS: compilation fixes from Diego R. Lopez.
        CONFIG: FAX mailer wasn't setting .FAX as a pseudo-domain unless
                you also had a FAX_RELAY.  From Thomas.Tornblom@Hax.SE.
        CONFIG: Minor glitch in S21 -- attachment of local domain name
                didn't have trailing dot.  From Jim Hickstein of Teradyne.
        CONFIG: Fix best_mx_is_local feature to allow nested addresses such as
                user%host@thishost.  From Claude Scarpelli of Infobiogen
                (France).
        CONFIG: OSTYPE(hpux10) failed to define the location of the help file.
                Pointed out by Hannu Martikka of Nokia Telecommunications.
        CONFIG: Diagnose some inappropriate ordering in configuration files,
                such as FEATURE(smrsh) listed after MAILER(local).  Based on
                a bug report submitted by Paul Hoffman of Proper Publishing.
        CONFIG: Make OSTYPE files consistently not override settings that
                have already been set.  Previously it worked differently
                for different files.
        CONFIG: Change relay mailer to do masquerading like 8.6 did.  My take
                is that this is wrong, but the change was causing problems
                for some people.  From Per Hedeland of Ericsson.
        CONTRIB: bitdomain.c patch from John Gardiner Myers <jgm+@CMU.EDU>;
                portability changes for Posix environments (no functional
                changes).

8.7.1/8.7.1     1995/10/01
        Old macros that have become options (SmtpGreetingMessage,
                OperatorChars, and UnixFromLine) didn't allow backslash
                escapes in the options, where they previously had.  Bug
                pointed out by John Hawkinson of MIT.
        Fix strange case of an executable called by a program map that
                returns a value but also a non-zero exit status; this
                would give contradictory results in the higher level; in
                particular, the default clause in the map lookup would be
                ignored.  Change to ignore the value if the program returns
                non-zero exit status.  From Tom Moore of AT&T GIS.
        Shorten parameters passed to syslog() in some contexts to avoid a
                bug in many vendors' implementations of that routine.  Although
                this isn't really a bug in sendmail per se, and my solution
                has to assume that syslog() has at least a 1K buffer size
                internally (I know some vendors have shortened this
                dramatically -- they're on their own), sendmail is a popular
                target.  Also, limit the size of %s arguments in sprintf.
                These both have possible security implications.  Solutions
                suggested by Casper Dik of Sun's Network Security Group
                (Holland), Mark Seiden, and others.
        Fix a problem that might cause a non-standard -B (body type)
                parameter to be passed to the next server with undefined
                results.  This could have security implications.
        If a filesystem was at > 100% utilization, the freediskspace()
                routine incorrectly returned an error rather than zero.
                Problem noted by G. Paul Ziemba of Alantec.
        Change MX sort order so that local hostnames (those in $=w) always
                sort first within a given preference.  This forces the bestmx
                map to always return the local host first, if it is included
                in the list of highest priority MX records.  From K. Robert
                Elz.
        Avoid some possible null pointer dereferences.  Fixes from Randy
                Martin <WOLF@CLEMSON.EDU>
        When sendmail starts up on systems that have no fully qualified
                domain name (FQDN) anywhere in the first matching host map
                (e.g., /etc/hosts if the hosts service searches "files dns"),
                sendmail would sleep to try to find a FQDN, which it really
                really needs.  This has been changed to fall through to the
                next map type if it can't find a FQDN -- i.e., if the hosts
                file doesn't have a FQDN, it will try dns even though the
                short name was found in /etc/hosts.  This is probably a crock,
                but many people have hosts files without FQDNs.  Remember:
                domain names are your friends.
        Log a high-priority message if you can't find your FQDN during startup.
                Suggested by Simon Barnes of Schlumberger Limited.
        When using Hesiod, initialize it early to improve error reporting.
                Patch from Don Lewis of Silicon Systems, Inc.
        Apparently at least some versions of Linux have a 90 !minute! TCP
                connection timeout in the kernel.  Add a new "connect" timeout
                to limit this time.  Defaults to zero (use whatever the
                kernel provides).  Based on code contributed by J.R. Oldroyd
                of TerraNet.
        Under some circumstances, a failed message would not be properly
                removed from the queue, causing tons of bogus error messages.
                (This fix eliminates the problematic EF_KEEPQUEUE flag.)
                Problem noted by Allan E Johannesen and Gregory Neil Shapiro
                of WPI.
        PORTABILITY FIXES:
                On IRIX 5.x, there was an inconsistency in the setting
                        of sendmail.st location.  Change the Makefile to
                        install it in /var/sendmail.st to match the OSTYPE
                        file and SGI standards.  From Andre
                        <andre@curry.zfe.siemens.de>.
                Support for Fujitsu/ICL UXP/DS (For the DS/90 Series)
                        from Diego R. Lopez <drlopez@cica.es>.
                Linux compilation patches from J.R. Oldroyd of TerraNet, Inc.
                LUNA 2 Mach patches from Motonori Nakamura.
                SunOS Makefile was including -ldbm, which is for the old
                        dbm library.  The ndbm library is part of libc.
        CONFIG: avoid bouncing ``user@host.'' (note trailing dot) with
                ``local configuration error'' in nullclient configuration.
                Patch from Gregory Neil Shapiro of WPI.
        CONFIG: don't allow an alias file in nullclient configurations --
                since all addresses are relayed, they give errors during
                rebuild.  Suggested by Per Hedeland of Ericsson.
        CONFIG: local mailer on Solaris 2 should always get a -f flag because
                otherwise the F=S causes the From_ line to imply that root is
                the sender.  Problem pointed out by Claude Scarpelli of
                Infobiogen (France).
        NEW FILES:
                cf/feature/use_ct_file.m4 (omitted from 8.7 by mistake)
                src/Makefiles/Makefile.KSR (omitted from 8.7 by mistake)
                src/Makefiles/Makefile.UXPDS

8.7/8.7         1995/09/16
        Fix a problem that could cause sendmail to run out of file
                descriptors due to a trashed data structure after a
                vfork.  Fix from Brian Coan of the Institute for
                Global Communications.
        Change the VRFY response if you have disabled VRFY -- some
                people seemed to think that it was too rude.
        Avoid reference to uninitialized file descriptor if HASFLOCK
                was not defined.  This was used "safely" in the sense
                that it only did a stat, but it would have set the
                map modification time improperly.  Problem pointed out
                by Roy Mongiovi of Georgia Tech.
        Clean up the Subject: line on warning messages and return
                receipts so that they don't say "Returned mail:"; this
                can be confusing.
        Move ruleset entry/exit debugging from 21.2 to 21.1 -- this is
                useful enough to make it worthwhile printing on "-d".
        Avoid logging alias statistics every time you read the alias
                file on systems with no database method compiled in.
        If you have a name with a trailing dot, and you try looking it
                up using gethostbyname without the dot (for /etc/hosts
                compatibility), be sure to turn off RES_DEFNAMES and
                RES_DNSRCH to avoid finding the wrong name accidentally.
                Problem noted by Charles Amos of the University of
                Maryland.
        Don't do timeouts in collect if you are not running SMTP.
                There is nothing that says you can't have a long
                running program piped into sendmail (possibly via
                /bin/mail, which just execs sendmail).  Problem reported
                by Don "Truck" Lewis of Silicon Systems.
        Try gethostbyname() even if the DNS lookup fails iff option I
                is not set.  This allows you to have hosts listed in
                NIS or /etc/hosts that are not known to DNS.  It's normally
                a bad idea, but can be useful on firewall machines.  This
                should really be broken out on a separate flag, I suppose.
        Avoid compile warnings against BIND 4.9.3, which uses function
                prototypes.  From Don Lewis of Silicon Systems.
        Avoid possible incorrect diagnosis of DNS-related errors caused
                by things like attempts to resolve uucp names using
                $[ ... $] -- the fix is to clear h_errno at appropriate
                times.  From Kyle Jones of UUNET.
        SECURITY: avoid denial-of-service attacks possible by destroying
                the alias database file by setting resource limits low.
                This involves adding two new compile-time options:
                HASSETRLIMIT (indicating that setrlimit(2) support is
                available) and HASULIMIT (indicating that ulimit(2) support
                is available -- the Release 3 form is used).  The former
                is assumed on BSD-based systems, the latter on System
                V-based systems.  Attack noted by Phil Brandenberger of
                Swarthmore University.
        New syntaxes in test (-bt) mode:
                ``.Dmvalue'' will define macro "m" to "value".
                ``.Ccvalue'' will add "value" to class "c".
                ``=Sruleset'' will dump the contents of the indicated
                        ruleset.
                ``=M'' will display the known mailers.
                ``-ddebug-spec'' is equivalent to the command-line
                        -d debug flag.
                ``$m'' will print the value of macro $m.
                ``$=c'' will print the contents of class $=c.
                ``/mx host'' returns the MX records for ``host''.
                ``/parse address'' will parse address, returning the value of
                        crackaddr (essentially, the comment information)
                        and the parsed address.
                ``/try mailer address'' will rewrite address into the form
                        it will have when presented to the indicated mailer.
                ``/tryflags flags'' will set flags used by parsing.  The
                        flags can be `H' for header or `E' for envelope,
                        and `S' for sender or `R' for recipient.  These
                        can be combined, so `HR' sets flags for header
                        recipients.
                ``/canon hostname'' will try to canonify hostname and
                        return the result.
                ``/map mapname key'' will look up `key' in the indicated
                        `mapname' and return the result.
        Somewhat better handling of UNIX-domain socket addresses -- it
                should show the pathname rather than hex bytes.
        Restore ``-ba'' mode -- this reads a file from stdin and parses
                the header for envelope sender information and uses
                CR-LF as message terminators.  It was thought to be
                obsolete (used only for Arpanet NCP protocols), but it
                turns out that the UK ``Grey Book'' protocols require
                that functionality.
        Fix a fix in previous release -- if gethostname and gethostbyname
                return a name without dots, and if an attempt to canonify
                that name fails, wait one minute and try again.  This can
                result in an extra 60 second delay on startup if your system
                hostname (as returned by hostname(1)) has no dot and no names
                listed in /etc/hosts or your NIS map have a dot.
        Check for proper domain name on HELO and EHLO commands per
                RFC 1123 section 5.2.5.  Problem noted by Thomas Dwyer III
                of Michigan Technological University.
        Relax chownsafe rules slightly -- old version said that if you
                can't tell if _POSIX_CHOWN_RESTRICTED is set (that is,
                if fpathconf returned EINVAL or ENOSYS), assume that
                chown is not safe.  The new version falls back to whether
                you are on a BSD system or not.  This is important for
                SunOS, which apparently always returns one of those
                error codes.  This impacts whether you can mail to files
                or not.
        Syntax errors such as unbalanced parentheses in the configuration
                file could be omitted if you had "Oem" prior to the
                syntax error in the config file.  Change to always print
                the error message.  It was especially weird because it
                would cause a "warning" message to be sent to the Postmaster
                for every message sent (but with no transcript).  Problem
                noted by Gregory Paris of Motorola.
        Rewrite collect and putbody to handle full 8-bit data, including
                zero bytes.  These changes are internally extensive, but
                should have minimal impact on external function.
        Allow full words for option names -- if the option letter is
                (apparently) a space, then take the word following -- e.g.,
                        O MatchGECOS=TRUE
                The full list of old and new names is as follows:
                        7       SevenBitInput
                        8       EightBitMode
                        A       AliasFile
                        a       AliasWait
                        B       BlankSub
                        b       MinFreeBlocks/MaxMessageSize
                        C       CheckpointInterval
                        c       HoldExpensive
                        D       AutoRebuildAliases
                        d       DeliveryMode
                        E       ErrorHeader
                        e       ErrorMode
                        f       SaveFromLine
                        F       TempFileMode
                        G       MatchGECOS
                        H       HelpFile
                        h       MaxHopCount
                        i       IgnoreDots
                        I       ResolverOptions
                        J       ForwardPath
                        j       SendMimeErrors
                        k       ConnectionCacheSize
                        K       ConnectionCacheTimeout
                        L       LogLevel
                        l       UseErrorsTo
                        m       MeToo
                        n       CheckAliases
                        O       DaemonPortOptions
                        o       OldStyleHeaders
                        P       PostmasterCopy
                        p       PrivacyOptions
                        Q       QueueDirectory
                        q       QueueFactor
                        R       DontPruneRoutes
                        r, T    Timeout
                        S       StatusFile
                        s       SuperSafe
                        t       TimeZoneSpec
                        u       DefaultUser
                        U       UserDatabaseSpec
                        V       FallbackMXHost
                        v       Verbose
                        w       TryNullMXList
                        x       QueueLA
                        X       RefuseLA
                        Y       ForkEachJob
                        y       RecipientFactor
                        z       ClassFactor
                        Z       RetryFactor
                The old macros that passed information into sendmail have
                been changed to options; those correspondences are:
                        $e      SmtpGreetingMessage
                        $l      UnixFromLine
                        $o      OperatorChars
                        $q      (deleted -- not necessary)
                To avoid possible problems with an older sendmail,
                configuration level 6 is accepted by this version of
                sendmail; any config file using the new names should
                specify "V6" in the configuration.
        Change address parsing to properly note that a phrase before a
                colon and a trailing semicolon are essentially the same
                as text outside of angle brackets (i.e., sendmail should
                treat them as comments).  This is to handle the
                ``group name: addr1, addr2, ..., addrN;'' syntax (it will
                assume that ``group name:'' is a comment on the first
                address and the ``;'' is a comment on the last address).
                This requires config file support to get right.  It does
                understand that :: is NOT this syntax, and can be turned
                off completely by setting the ColonOkInAddresses option.
        Level 6 config files added with new mailer flags:
                    A   Addresses are aliasable.
                    i   Do udb rewriting on envelope as well as header
                        sender lines.  Applies to the from address mailer
                        flags rather than the recipient mailer flags.
                    j   Do udb rewriting on header recipient addresses.
                        Applies to the sender mailer flags rather than the
                        recipient mailer flags.
                    k   Disable check for loops when doing HELO command.
                    o   Always run as the mail recipient, even on local
                        delivery.
                    w   Check for an /etc/passwd entry for this user.
                    5   Pass addresses through ruleset 5.
                    :   Check for :include: on this address.
                    |   Check for |program on this address.
                    /   Check for /file on this address.
                    @   Look up sender header addresses in the user
                        database.  Applies to the mailer flags for the
                        mailer corresponding to the envelope sender
                        address, rather than to recipient mailer flags.
                Pre-level 6 configuration files set A, w, 5, :, |, /, and @
                on the "local" mailer, the o flag on the "prog" and "*file*"
                mailers, and the ColonOkInAddresses option.
        Eight-to-seven bit MIME conversions.  This borrows ideas from
                John Beck of Hewlett-Packard, who generously contributed
                their implementation to me, which I then didn't use (see
                mime.c for an explanation of why).  This adds the
                EightBitMode option (a.k.a. `8') and an F=8 mailer flag
                to control handling of 8-bit data.  These have to cope with
                two types of 8-bit data: unlabelled 8-bit data (that is,
                8-bit data that is entered without declaring it as 8-bit
                MIME -- technically this is illegal according to the
                specs) and labelled 8-bit data (that is, it was declared
                as 8BITMIME in the ESMTP session or by using the
                -B8BITMIME command line flag).  If the F=8 mailer flag is
                set then 8-bit data is sent to non-8BITMIME machines
                instead of converting to 7 bit (essentially using
                just-send-8 semantics).  The values for EightBitMode are:
                    m   convert unlabelled 8-bit input to 8BITMIME, and do
                        any necessary conversion of 8BITMIME to 7BIT
                        (essentially, the full MIME option).
                    p   pass unlabelled 8-bit input, but convert labelled
                        8BITMIME input to 7BIT as required (default).
                    s   strict adherence: reject unlabelled 8-bit input,
                        convert 8BITMIME to 7BIT as required.  The F=8
                        flag is ignored.
                Unlabelled 8-bit data is rejected in mode `s' regardless of
                        the setting of F=8.
        Add new internal class 'n', which is the set of MIME Content-Types
                which can not be 8 to 7 bit encoded because of other
                considerations.  Types "multipart/*" and "message/*" are
                never directly encoded (although their components can be).
        Add new internal class 's', which is the set of subtypes of the
                MIME message/* content type that can be treated as though
                they are an RFC822 message.  It is predefined to have
                "rfc822".  Suggested By Kari Hurtta.
        Add new internal class 'e'.  This is the set of MIME
                Content-Transfer-Encodings that can be converted to
                a seven bit format (Quoted-Printable or Base64).  It is
                preinitialized to contain "7bit", "8bit", and "binary".
        Add C=charset mailer parameter and the the DefaultCharSet option (no
                short name) to set the default character set to use in the
                Content-Type: header when doing encoding of an 8-bit message
                which isn't marked as MIME into MIME format.  If the C=
                parameter is set on the Envelope From address, use that as
                the default encoding; else use the DefaultCharSet option.
                If neither is set, it defaults to "unknown-8bit" as
                suggested by RFC 1428 section 3.
        Allow ``U=user:group'' field in mailer definition to set a default
                user and group that a mailer will be executed as.  This
                overrides the 'u' and 'g' options, and if the `F=S' flag is
                also set, it is the uid/gid that will always be used (that
                is, the controlling address is ignored).  The values may be
                numeric or symbolic; if only a symbolic user is given (no
                group) that user's default group in the passwd file is used
                as the group.  Based on code donated by Chip Rosenthal of
                Unicom.
        Allow `u' option to also accept user:group as a value, in the same
                fashion as the U= mailer option.
        Add the symbolic time zone name in the Arpanet format dates (as
                a comment).  This adds a new compile-time configuration
                flag: TZ_TYPE can be set to TZ_TM_NAME (use the value
                of (struct tm *)->tm_name), TZ_TM_ZONE (use the value
                of (struct tm *)->tm_zone), TZ_TZNAME (use extern char
                *tzname[(struct tm *)->tm_isdst]), TZ_TIMEZONE (use
                timezone()), or TZ_NONE (don't include the comment).  Code
                from Chip Rosenthal.
        The "Timeout" option (formerly "r") is extended to allow suboptions.
                For example,
                    O Timeout.helo = 2m
                There are also two new suboptions "queuereturn" and
                "queuewarn"; these subsume the old T option.  Thus, to
                set them both the preferred new syntax is
                    O Timeout.queuereturn = 5d
                    O Timeout.queuewarn = 4h
        Sort queue by host name instead of by message priority if the
                QueueSortOrder option (no short name) is set is set to
                ``host''.  This makes better use of the connection cache,
                but may delay more ``interactive'' messages behind large
                backlogs under some circumstances.  This is probably a
                good option if you have high speed links or don't do lots
                of ``batch'' messages, but less good if you are using
                something like PPP on a 14.4 modem.  Based on code
                contributed by Roy Mongiovi of Georgia Tech (my main
                contribution was to make it configurable).
        Save i-number of df file in qf file to simplify rebuilding of queue
                after disastrous disk crash.  Suggested by Kyle Jones of
                UUNET; closely based on code from KJS DECWRL code written
                by Paul Vixie.  NOTA BENE: The qf files produced by 8.7
                are NOT back compatible with 8.6 -- that is, you can convert
                from 8.6 to 8.7, but not the other direction.
        Add ``F=d'' mailer flag to disable all use of angle brackets in
                route-addrs in envelopes; this is because in some cases
                they can be sent to the shell, which interprets them as
                I/O redirection.
        Don't include error file (option E) with return-receipts; this
                can be confusing.
        Don't send "Warning: cannot send" messages to owner-* or
                *-request addresses.  Suggested by Christophe Wolfhugel
                of the Institut Pasteur, Paris.
        Allow -O command line flag to set long form options.
        Add "MinQueueAge" option to set the minimum time between attempts
                to run the queue.  For example, if the queue interval
                (-q value) is five minutes, but the minimum queue age
                is fifteen minutes, jobs won't be tried more often than
                once every fifteen minutes.  This can be used to give
                you more responsiveness if your delivery mode is set to
                queue-only.
        Allow "fileopen" timeout (default: 60 seconds) for opening
                :include: and .forward files.
        Add "-k", "-v", and "-z" flags to map definitions; these set the
                key field name, the value field name, and the field
                delimiter.  The field delimiter can be a single character
                or the sequence "\t" or "\n" for tab or newline.
                These are for use by NIS+ and similar access methods.
        Change maps to always strip quotes before lookups; the -q flag
                turns off this behavior.  Suggested by Motonori Nakamura.
        Add "nisplus" map class.  Takes -k and -v flags to choose the
                key and value field names respectively.  Code donated by
                Sun Microsystems.
        Add "hesiod" map class.  The "file name" is used as the
                "HesiodNameType" parameter to hes_resolve(3).  Returns the
                first value found for the match.  Code donated by Scott
                Hutton of Indiana University.
        Add "netinfo" (NeXT NetInfo) map class.  Maps can have a -k flag to
                specify the name of the property that is searched as the
                key and a -v flag to specify the name of the property that
                is returned as the value (defaults to "members").  The
                default map is "/aliases".  Some code based on code
                contributed by Robert La Ferla of Hot Software.
        Add "text" map class.  This does slow, linear searches through
                text files.  The -z flag specifies a column delimiter
                (defaults to any sequence of white space), the -k flag
                sets the key column number, and the -v flag sets the
                value column number.  Lines beginning with `#' are treated
                as comments.
        Add "program" map class to execute arbitrary programs.  The search
                key is presented as the last argument; the output is one
                line read from the programs standard output.  Exit statuses
                are from sysexits.h.
        Add "sequence" map class -- searches maps in sequence until it
                finds a match.  For example, the declarations:
                    Kmap1 ...
                    Kmap2 ...
                    Kmapseq sequence map1 map2
                defines a map "mapseq" that first searches map1; if the
                value is found it is returned immediately, otherwise
                map2 is searched and the value returned.
        Add "switch" map class.  This is much like "sequence" except that
                the ordering is fetched from an external file, usually
                the system service switch.  The parameter is the name of
                the service to switch on, and the maps that it will use
                are the name of the switch map followed by ".service_type".
                For example, if the declaration of the map is
                    Ksample switch hosts
                and the system service switch specifies that hosts are
                looked up using dns and nis in that order, then this is
                equivalent to
                    Ksample sequence sample.dns sample.nis
                The subordinate maps (sample.*) must already be defined.
        Add "user" map class -- looks up users using getpwnam.  Takes a
                "-v field" flag on the definition that tells what passwd
                entry to return -- legal values are name, passwd, uid, gid,
                gecos, dir, and shell.  Generally expected to be used with
                the -m (matchonly) flag.
        Add "bestmx" map class -- returns the best MX value for the host
                listed as the value.  If there are several "best" MX records
                for this host, one will be chosen at random.
        Add "userdb" map class -- looks up entries in the user database.
                The "file name" is actually the tag that will be used,
                typically "mailname".  If there are multiple entries
                matching the name, the one chosen is undefined.
        Add multiple queue timeouts (both return and warning).  These are
                set by the Precedence: or Priority: header fields to one of
                three values.  If a Priority: is set and has value "normal",
                "urgent", or "non-urgent" the corresponding timeouts are
                used.  If no priority is set, the Precedence: is consulted;
                if negative, non-urgent timeouts are used; if greater than
                zero, urgent timeouts are used.  Otherwise, normal timeouts
                are used.  The timeouts are set by setting the six timeouts
                queue{warn,return}.{urgent,normal,non-urgent}.
        Fix problem when a mail address is resolved to a $#error mailer
                with a temporary failure indication; it works in SMTP,
                but when delivering locally the mail is silently discarded.
                This patch, from Kyle Jones of UUNET, bounces it instead
                of queueing it (queueing is very hard).
        When using /etc/hosts or NIS-style lookups, don't assume that
                the first name in the list is the best one -- instead,
                search for the first one with a dot.  For example, if
                an /etc/hosts entry reads
                    128.32.149.68       mammoth mammoth.CS.Berkeley.EDU
                this change will use the second name as the canonical
                machine name instead of the initial, unqualified name.
        Change dequote map to replace spaces in quoted text with a value
                indicated by the -s flag on the dequote map definition.
                For example, ``Mdequote dequote -s_'' will change
                "Foo Bar" into an unquoted Foo_Bar instead of leaving it
                quoted (because of the space character).  Suggested by Dan
                Oscarsson for use in X.400 addresses.
        Implement long macro names as ${name}; long class names can
                be similarly referenced as $={name} and $~{name}.
                Definitions are (e.g.) ``D{name}value''.  Names that have
                a leading lower case letter or punctuation characters are
                reserved for internal use by sendmail; i.e., config files
                should use names that begin with a capital letter.  Based
                on code contributed by Dan Oscarsson.
        Fix core dump if getgrgid returns a null group list (as opposed
                to an empty group list, that is, a pointer to a list
                with no members).  Fix from Andrew Chang of Sun Microsystems.
        Fix possible core dump if malloc fails -- if the malloc in xalloc
                failed, it called syserr which called newstr which called
                xalloc....  The newstr is now avoided for "panic" messages.
                Reported by Stuart Kemp of James Cook University.
        Improve connection cache timeouts; previously, they were not even
                checked if you were delivering to anything other than an
                IPC-connected host, so a series of (say) local mail
                deliveries could cause cached connections to be open
                much longer than the specified timeout.
        If an incoming message exceeds the maximum message size, stop
                writing the incoming bytes to the queue data file, since
                this can fill your mqueue partition -- this is a possible
                denial-of-service attack.
        Don't reject all numeric local user names unless HESIOD is
                defined.  It turns out that Posix allows all-numeric
                user names.  Fix from Tony Sanders of BSDI.
        Add service switch support.  If the local OS has a service
                switch (e.g., /etc/nsswitch.conf on Solaris or /etc/svc.conf
                on DEC systems) that will be used; otherwise, it falls back
                to using a local mechanism based on the ServiceSwitchFile
                option (default: /etc/service.switch).  For example, if the
                service switch lists "files" and "nis" for the aliases
                service, that will be the default lookup order.  the "files"
                ("local" on DEC) service type expands to any alias files
                you listed in the configuration file, even if they aren't
                actually file lookups.
        Option I (NameServerOptions) no longer sets the "UseNameServer"
                variable which tells whether or not DNS should be considered
                canonical.  This is now determined based on whether or not
                "dns" is in the service list for "hosts".
        Add preliminary support for the ESMTP "DSN" extension (Delivery
                Status Notifications).  DSN notifications override
                Return-Receipt-To: headers, which are bogus anyhow --
                support for them has been removed.
        Add T=mts-name-type/address-type/diagnostic-type keyletter to mailer
                definitions to define the types used in DSN returns for
                MTA names, addresses, and diagnostics respectively.
        Extend heuristic to force running in ESMTP mode to look for the
                five-character string "ESMTP" anywhere in the 220 greeting
                message (not just the second line).  This is to provide
                better compatibility with other ESMTP servers.
        Print sequence number of job when running the queue so you can
                easily see how much progress you have made.  Suggested
                by Peter Wemm of DIALix.
        Map newlines to spaces in logged message-ids; some versions of
                syslog truncate the rest of the line after newlines.
                Suggested by Fletcher Mattox of U. Texas.
        Move up forking for job runs so that if a message is split into
                multiple envelopes you don't get "fork storms" -- this
                also improves the connection cache utilization.
        Accept "<<>>", "<<<>>>", and so forth as equivalent to "<>" for
                the purposes of refusing to send error returns.  Suggested
                by Motonori Nakamura of Ritsumeikan University.
        Relax rules on when a file can be written when referenced from
                the aliases file: use the default uid/gid instead of the
                real uid/gid.  This allows you to create a file owned by
                and writable only by the default uid/gid that will work
                all the time (without having the set-user-ID bit set).  Change
                suggested by Shau-Ping Lo and Andrew Cheng of Sun
                Microsystems.
        Add "DialDelay" option (no short name) to provide an "extra"
                delay for dial on demand systems.  If this is non-zero
                and a connect fails, sendmail will wait this long and
                then try again.  If it takes longer than the kernel
                timeout interval to establish the connection, this
                option can give the network software time to establish
                the link.  The default units are seconds.
        Move logging of sender information to be as early as possible;
                previously, it could be delayed a while for SMTP mail
                sent to aliases.  Suggested by Brad Knowles of the
                Defense Information Systems Agency.
        Call res_init() before setting RES_DEBUG; this is required by
                BIND 4.9.3, or so I'm told.  From Douglas Anderson of
                the National Computer Security Center.
        Add xdelay= field in logs -- this is a transaction delay, telling
                you how long it took to deliver to this address on the
                last try.  It is intended to be used for sorting mailing
                lists to favor "quick" addresses.  Provided for use by
                the mailprio scripts (see below).
        If a map cannot be opened, and that map is non-optional, and
                an address requires that map for resolution, queue the
                map instead of bouncing it.  This involves creating a
                pseudo-class of maps called "bogus-map" -- if a required
                map cannot be opened, the class is changed to bogus-map;
                all queries against bogus-map return "tempfail".  The
                bogus-map class is not directly accessible.  A sample
                implementation was donated by Jem Taylor of Glasgow
                University Computing Service.
        Fix a possible core dump when mailing to a program that talks
                SMTP on its standard input.  Fix from Keith Moore of
                the University of Kentucky.
        Make it possible to resolve filenames to $#local $: @ /filename;
                previously, the "@" would cause it to not be recognized
                as a file.  Problem noted by Brian Hill of U.C. Davis.
        Accept a -1 signal to re-exec the daemon.  This only works if
                argv[0] is a full path to sendmail.
        Fix bug in "addr=..." field in O option on little-endian machines
                -- the network number wasn't being converted to network
                byte order.  Patch from Kurt Lidl of Pix Technologies
                Corporation.
        Pre-initialize the resolver early on; this is to avoid a bug with
                BIND 4.9.3 that can cause the _res.retry field to get
                reset to zero, causing all name server lookups to time
                out.  Fix from Matt Day of Artisoft.
        Restore T line (trusted users) in config file -- but instead of
                locking out the -f flag, they just tell whether or not
                an X-Authentication-Warning: will be added.  This really
                just creates new entries in class 't', so "Ft/file/name"
                can be used to read trusted user names from a file.
                Trusted users are also allowed to execute programs even
                if they have a shell that isn't in /etc/shells.
        Improve NEWDB alias file rebuilding so it will create them
                properly if they do not already exist.  This had been
                a MAYBENEXTRELEASE feature in 8.6.9.
        Check for @:@ entry in NIS maps before starting up to avoid
                (but not prevent, sigh) race conditions.  This ought to
                be handled properly in ypserv, but isn't.  Suggested by
                Michael Beirne of Motorola.
        Refuse connections if there isn't enough space on the filesystem
                holding the queue.  Contributed by Robert Dana of Wolf
                Communications.
        Skip checking for directory permissions in the path to a file
                when checking for file permissions iff setreuid()
                succeeded -- it is unnecessary in that case.  This avoids
                significant performance problems when looking for .forward
                files.  Based on a suggestion by Win Bent of USC.
        Allow symbolic ruleset names.  Syntax can be "Sname" to get an
                arbitrary ruleset number assigned or "Sname = integer"
                to assign a specific ruleset number.  Reference is
                $>name_or_number.  Names can be composed of alphas, digits,
                underscore, or hyphen (first character must be non-numeric).
        Allow -o flag on AliasFile lines to make the alias file optional.
                From Bryan Costales of ICSI.
        Add NoRecipientAction option to handle the case where there is
                no legal recipient header in the message.  It can take
                on values:
                  None                  Leave the message as is.  The
                                        message will be passed on even
                                        though it is in technically
                                        illegal syntax.
                  Add-To                Add a To: header with any
                                        recipients that it can find from
                                        the envelope.  This risks exposing
                                        Bcc: recipients.
                  Add-Apparently-To     Add an Apparently-To: header.  This
                                        has almost no redeeming social value,
                                        and is provided only for back
                                        compatibility.
                  Add-To-Undisclosed    Add a header reading
                                        To: undisclosed-recipients:;
                                        which will have the effect of
                                        making the message legal without
                                        exposing Bcc: recipients.
                  Add-Bcc               To add an empty Bcc: header.
                                        There is a chance that mailers down
                                        the line will delete this header,
                                        which could cause exposure of Bcc:
                                        recipients.
                The default is NoRecipientAction=None.
        Truncate (rather than delete) Bcc: lines in the header.  This
                should prevent later sendmails (at least, those that don't
                themselves delete Bcc:) from considering this message to
                be non-conforming -- although it does imply that non-blind
                recipients can see that a Bcc: was sent, albeit not to whom.
        Add SafeFileEnvironment option.  If declared, files named as delivery
                targets must be regular files in addition to the regular
                checks.  Also, if the option is non-null then it is used as
                the name of a directory that is used as a chroot(2)
                environment for the delivery; the file names listed in an
                alias or forward should include the name of this root.
                For example, if you run with
                        O SafeFileEnvironment=/arch
                then aliases should reference "/arch/rest/of/path".  If a
                value is given, sendmail also won't try to save to
                /usr/tmp/dead.letter (instead it just leaves the job in the
                queue as Qfxxxxxx).  Inspired by *Hobbit*'s sendmail patch kit.
        Support -A flag for alias files; this will comma concatenate like
                entries.  For example, given the aliases:
                        list: member1
                        list: member2
                and an alias file declared as:
                        OAhash:-A /etc/aliases
                the final alias inserted will be "list: member1,member2";
                without -A you will get an error on the second and subsequent
                alias for "list".  Contributed by Bryan Costales of ICSI.
        Line-buffer transcript file.  Suggested by Liudvikas Bukys.
        Fix a problem that could cause very long addresses to core dump in
                some special circumstances.  Problem pointed out by Allan
                Johannesen.
        (Internal change.)  Change interface to expand() (macro expansion)
                to be simpler and more consistent.
        Delete check for funny qf file names.  This didn't really give
                any extra security and caused some people some problems.
                (If you -really- want this, define PICKY_QF_NAME_CHECK
                at compile time.)  Suggested by Kyle Jones of UUNET.
        (Internal change.)  Change EF_NORETURN to EF_NO_BODY_RETN and
                merge with DSN code; this is simpler and more consistent.
                This may affect some people who have written their own
                checkcompat() routine.
        (Internal change.)  Eliminate `D' line in qf file.  The df file
                is now assumed to be the same name as the qf file (with
                the `q' changed to a `d', of course).
        Avoid forking for delivery if all recipient mailers are marked as
                "expensive" -- this can be a major cost on some systems.
                Essentially, this forces sendmail into "queue only" mode
                if all it is going to do is queue anyway.
        Avoid sending a null message in some rather unusual circumstances
                (specifically, the RCPT command returns a temporary
                failure but the connection is lost before the DATA
                command).  Fix from Scott Hammond of Secure Computing
                Corporation.
        Change makesendmail to use a somewhat more rational naming scheme:
                Makefiles and obj directories are named $os.$rel.$arch,
                where $os is the operating system (e.g., SunOS), $rel is
                the release number (e.g., 5.3), and $arch is the machine
                architecture (e.g., sun4).  Any of these can be omitted,
                and anything after the first dot in a release number can
                be replaced with "x" (e.g., SunOS.4.x.sun4).  The previous
                version used $os.$arch.$rel and was rather less general.
        Change makesendmail to do a "make depend" in the target directory
                when it is being created.  This involves adding an empty
                "depend:" entry in most Makefiles.
        Ignore IDENT return value if the OSTYPE field returns "OTHER",
                as indicated by RFC 1413.  Pointed out by Kari Hurtta
                of the Finnish Meteorological Institute.
        Fix problem that could cause multiple responses to DATA command
                on header syntax errors (e.g., lines beginning with colons).
                Problem noted by Jens Thomassen of the University of Oslo.
        Don't let null bytes in headers cause truncation of the rest of
                the header.
        Log Authentication-Warning:s.  Suggested by Motonori Nakamura.
        Increase timeouts on message data puts to allow time for receivers
                to canonify addresses in headers on the fly.  This is still
                a rather ugly heuristic.  From Motonori Nakamura.
        Add "HasWildcardMX" suboption to ResolverOptions; if set, MX
                records are not used when canonifying names, and when MX
                lookups are done for addressing they must be fully
                qualified.  This is useful if you have a wildcard MX record,
                although it may cause other problems.  In general, don't use
                wildcard MX records.  Patch from Motonori Nakamura.
        Eliminate default two-line SMTP greeting message.  Instead of
                adding an extra "ESMTP spoken here" line, the word "ESMTP"
                is added between the first and second word of the first
                line of the greeting message (i.e., immediately after the
                host name).  This eliminates the need for the BROKEN_SMTP_PEERS
                compile flag.  Old sendmails won't see the ESMTP, but that's
                acceptable because SIZE was the only useful extension that
                old sendmails understand.
        Avoid gethostbyname calls on UNIX domain sockets during SIGUSR1
                invoked state dumps.  From Masaharu Onishi.
        Allow on-line comments in .forward and :include: files; they are
                introduced by the string "<LWSP>#@#<LWSP>", where <LWSP>
                is a space or a tab.  This is intended for native
                representation of non-ASCII sets such as Japanese, where
                existing encodings would be unreadable or would lose
                data -- for example,
                 <motonori@cs.ritsumei.ac.jp> NAKAMURA Motonori
                                        (romanized/less information)
                 <motonori@cs.ritsumei.ac.jp> =?ISO-2022-JP?B?GyRCQ2ZCPBsoQg==?=
                                              =?ISO-2022-JP?B?GyRCQUdFNRsoQg==?=
                                        (with MIME encoding, not human readable)
                 <motonori@cs.ritsumei.ac.jp> #@# ^[$BCfB<^[(B ^[$BAGE5^[(B
                                        (native encoding with ISO-2022-JP)
                The last form is human readable in the Japanese environment.
                Based on a fix from (surprise!) Motonori Nakamura.
        Don't make SMTP error returns on MAIL FROM: line be "sticky" for all
                messages to that host; these are most frequently associated
                with addresses rather than the host, with the exception of
                421 (service shutting down).  The effect was to cause queues
                to sometimes take an excessive time to flush.  Reported by
                Robert Sargent of Southern Geographics Technologies and
                Eric Prestemon of American University.
        Add Nice=N mailer option to set the niceness at which a mailer will
                run.  This is actually a relative niceness (that is, an
                increment on the background value).
        Log queue runs that are skipped due to high loads.  They are logged
                at LOG_INFO priority iff the log level is > 8.  Contributed
                by Bruce Nagel of Data General.
        Allow the error mailer to accept a DSN-style error status code
                instead of an sysexits status code in the host part.
                Anything with a dot will be interpreted as a DSN-style code.
        Add new mailer flag: F=3 will tell translations to Quoted-Printable
                to encode characters that might be munged by an EBCDIC system
                in addition to the set required by RFC 1521.  The additional
                characters are !, ", #, $, @, [, \, ], ^, `, {, |, }, and ~.
                (Think of "IBM 360" as the mnemonic for this flag.)
        Change check for mailing to files to look for a pathname of [FILE]
                rather than looking for the mailer named *file*.  The mapping
                of leading slashes still goes to the *file* mailer.  This
                allows you to implement the *file* mailer as a separate
                program, for example, to insert a Content-Length: header
                or do special security policy.  However, note that the usual
                initial checking for the file permissions is still done, and
                the program in question needs to be very careful about how
                it does the file write to avoid security problems.
        Be able to read ~root/.forward even if the path isn't accessible to
                regular users.  This is disrecommended because sendmail
                sometimes does not run as root (e.g., when an unsafe option
                is specified on the command line), but should otherwise be
                safe because .forward files must be owned by the user for
                whom mail is being forwarded, and cannot be a symbolic link.
                Suggested by Forrest Aldrich of Wang Laboratories.
        Add new "HostsFile" option that is the pathname to the /etc/hosts
                file.  This is used for canonifying hostnames when the
                service type is "files".
        Implement programs on F (read class from file) line.  The syntax is
                Fc|/path/to/program to read the output from the program
                into class "c".
        Probe the network interfaces to find alternate names for this
                host.  Requires the SIOCGIFCONF ioctl call.  Code
                contributed by SunSoft.
        Add "E" configuration line to set or propagate environment
                variables into children.  "E<envar>" will propagate
                the named variable from the environment when sendmail
                was invoked into any children it calls; "E<envar>=<value>"
                sets the named variable to the indicated value.  Any
                variables not explicitly named will not be in the child
                environment.  However, sendmail still forces an
                "AGENT=sendmail" environment variable, in part to enforce
                at least one environment variable, since many programs and
                libraries die horribly if this is not guaranteed.
        Change heuristic for rebuilding both NEWDB and NDBM versions of
                alias databases -- new algorithm looks for the substring
                "/yp/" in the file name.  This is more portable and involves
                less overhead.  Suggested by Motonori Nakamura.
        Dynamically allocate the queue work list so that you don't lose
                jobs in large queue runs.  The old QUEUESIZE compile parameter
                is replaced by QUEUESEGSIZE (the unit of allocation, which
                should not need to be changed) and the MaxQueueRunSize option,
                which is the absolute maximum number of jobs that will ever
                be handled in a single queue run.  Based on code contributed
                by Brian Coan of the Institute for Global Communications.
        Log message when a message is dropped because it exceeds the maximum
                message size.  Suggested by Leo Bicknell of Virginia Tech.
        Allow trusted users (those on a T line or in $=t) to use -bs without
                an X-Authentication-Warning: added.  Suggested by Mark Thomas
                of Mark G. Thomas Consulting.
        Announce state of compile flags on -d0.1 (-d0.10 throws in the
                OS-dependent defines).  The old semantic of -d0.1 to not
                run the daemon in background has been moved to -d99.100,
                and the old 52.5 flag (to avoid disconnect() from closing
                all output files) has been moved to 52.100.  This makes
                things more consistent (flags below .100 don't change
                semantics) and separates out the backgrounding so that
                it doesn't happen automatically on other unrelated debugging
                flags.
        If -t is used but no addresses are found in the header, give an
                error message rather than just doing nothing.  Fix from
                Motonori Nakamura.
        On systems (like SunOS) where the effective gid is not necessarily
                included in the group list returned by getgroups(), the
                `restrictmailq' option could sometimes cause an authorized
                user to not be able to use `mailq'.  Fix from Charles Hannum
                of MIT.
        Allow symbolic service names for [IPC] mailers.  Suggested by
                Gerry Magennis of Logica International.
        Add DontExpandCnames option to prevent $[ ... $] from expanding CNAMEs
                when running DNS.  For example, if the name FTP.Foo.ORG is
                a CNAME for Cruft.Foo.ORG, then when sitting on a machine in
                the Foo.ORG domain a lookup of "FTP" returns "Cruft.Foo.ORG"
                if this option is not set, or "FTP.Foo.ORG" if it is set.
                This is technically illegal under RFC 822 and 1123, but the
                IETF is moving toward legalizing it.  Note that turning on
                this option is not sufficient to guarantee that a downstream
                neighbor won't rewrite the address for you.
        Add "-m" flag to makesendmail script -- this tells you what object
                directory and Makefile it will use, but doesn't actually do
                the make.
        Do some additional checking on the contents of the qf file to try
                to detect attacks against the qf file.  In particular,
                abort on any line beginning "From ", and add an "end of
                file" line -- any data after that line is prohibited.
        Always use /etc/sendmail.cf, regardless of the arbitrary vendor
                choices.  This can be overridden in the Makefile by using
                either -DUSE_VENDOR_CF_PATH to get the vendor location
                (to the extent that we know it) or by defining
                _PATH_SENDMAILCF (which is a "hard override").  This allows
                sendmail 8 to have more consistent installation instructions.
        Allow macros on `K' line in config file.  Suggested by Andrew Chang
                of Sun Microsystems.
        Improved symbol table hash function from Eric Wassenaar.  This one
                is at least 50% faster.
        Fix problem that didn't notice that timeout on file open was a
                transient error.  Fix from Larry Parmelee of Cornell
                University.
        Allow comments (lines beginning with a `#') in files read for
                classes.  Suggested by Motonori Nakamura.
        Make SIGINT (usually ^C) in test mode return to the prompt instead
                of dropping out entirely.  This makes testing some of the
                name server lookups easier to deal with when there are
                hung servers.  From Motonori Nakamura.
        Add new ${opMode} macro that is set to the current operation mode
                (e.g., `s' for -bs, `t' for -bt, etc.).  Suggested by
                Claude Marinier <MARINIER@emp.ewd.dreo.dnd.ca>.
        Add new delivery mode (Odd) that defers all map lookups to queue runs.
                Kind of like queue-only mode (Odq) except it tries to avoid
                any external service requests; for dial-on-demand hosts that
                want to minimize DNS lookups when mail is being queued.  For
                this to work you will also have to make sure that gethostbyname
                of your local host name does not do a DNS lookup.
        Improved handling of "out of space" conditions from John Myers of
                Carnegie Mellon.
        Improved security for mailing to files on systems that have fchmod(2)
                support.
        Improve "cannot send message for N days" message -- now says "could
                not send for past N days".  Suggested by Tom Moore of AT&T
                Global Information Solutions.
        Less misleading Subject: line on messages sent to postmaster only.
                From Motonori Nakamura.
        Avoid duplicate error messages on bad command line flags.  From
                Motonori Nakamura.
        Better error message for case where ruleset 0 falls off the end
                or otherwise does not resolve to a canonical triple.
        Fix a problem that could cause multiple bounce messages if a bad
                address was sent along with a good address to an SMTP
                site where that SMTP site returned a 4yz code in response
                to the final dot of the data.  Problem reported by David
                James of British Telecom.
        Add "volatile" declarations so that gcc -O2 will work.  Patches
                from Alexander Dupuy of System Management ARTS.
        Delete duplicates in MX lists -- believe it or not, there are sites
                that list the same host twice in an MX list.  This deletion
                only works on adjacent preferences, so an MX list that
                had A=5, B=10, A=15 would leave both As, but one that had
                A=5, A=10, B=15 would reduce to A, B.  This is intentional,
                just in case there is something weird I haven't thought of.
                Suggested by Barry Shein of Software Tool & Die.
        SECURITY: .forward files cannot be symbolic links.  If they are,
                a bad guy can read your private files.
        PORTABILITY FIXES:
                Solaris 2 from Rob McMahon <cudcv@csv.warwick.ac.uk>.
                System V Release 4 from Motonori Nakamura of Ritsumeikan
                        University.  This expands the disk size
                        checking to include all (?) SVR4 configurations.
                System V Release 4 from Kimmo Suominen -- initgroups(3)
                        and setrlimit(2) are both available.
                System V Release 4 from sob@sculley.ffg.com -- some versions
                        apparently "have EX_OK defined in other headerfiles."
                Linux Makefile typo.
                Linux getusershell(3) is broken in Slackware 2.0 --
                        from Andrew Pam of Xanadu Australia.
                More Linux tweaking from John Kennedy of California State
                        University, Chico.
                Cray changes from Eric Wassenaar:  ``On Cray, shorts,
                        ints, and longs are all 64 bits, and all structs
                        are multiples of 64 bits.  This means that the
                        sizeof operator returns only multiples of 8.
                        This requires adaptation of code that really
                        deals with 32 bit or 16 bit fields, such as IP
                        addresses or nameserver fields.''
                DG/UX 5.4.3 from Mark T. Robinson <mtr@ornl.gov>.  To
                        get the old behavior, use -DDGUX_5_4_2.
                DG/UX hack: add _FORCE_MAIL_LOCAL_=yes environment
                        variable to fix bogus /bin/mail behavior.
                Tandem NonStop-UX from Rick McCarty <mccarty@mpd.tandem.com>.
                        This also cleans up some System V Release 4 compile
                        problems.
                Solaris 2: sendmail.cw file should be in /etc/mail to
                        match all the other configuration files.  Fix
                        from Glenn Barry of Emory University.
                Solaris 2.3: compile problem in conf.c.  Fix from Alain
                        Nissen of the University of Liege, Belgium.
                Ultrix: freespace calculation was incorrect.  Fix from
                        Takashi Kizu of Osaka University.
                SVR4: running in background gets a SIGTTOU because the
                        emulation code doesn't realize that "getpeername"
                        doesn't require reading the file.  Fix from Peter
                        Wemm of DIALix.
                Solaris 2.3: due to an apparent bug in the socket emulation
                        library, sockets can get into a "wedged" state where
                        they just return EPROTO; closing and re-opening the
                        socket clears the problem.  Fix from Bob Manson
                        of Ohio State University.
                Hitachi 3050R & 3050RX running HI-UX/WE2: portability
                        fixes from Akihiro Hashimoto ("Hash") of Chiba
                        University.
                AIX changes to allow setproctitle to work from Rainer Schöpf
                        of Zentrum für Datenverarbeitung der Universität
                        Mainz.
                AIX changes for load average from Ed Ravin of NASA/Goddard.
                SCO Unix from Chip Rosenthal of Unicom (code was using the
                        wrong statfs call).
                ANSI C fixes from Adam Glass (NetBSD project).
                Stardent Titan/ANSI C fixes from Kate Hedstrom of Rutgers
                        University.
                DG-UX fixes from Bruce Nagel of Data General.
                IRIX64 updates from Mark Levinson of the University of
                        Rochester Medical Center.
                Altos System V (``the first UNIX/XENIX merge the Altos
                        did for their Series 1000 & Series 2000 line;
                        their merged code was licensed back to AT&T and
                        Microsoft and became System V release 3.2'') from
                        Tim Rice <timr@crl.com>.
                OSF/1 running on Intel Paragon from Jeff A. Earickson
                        <jeff@ssd.intel.com> of Intel Scalable Systems
                        Division.
                Amdahl UTS System V 2.1.5 (SVr3-based) from Janet Jackson
                        <janet@dialix.oz.au>.
                System V Release 4 (statvfs semantic fix) from Alain
                        Durand of I.M.A.G.
                HP-UX 10.x multiprocessor load average changes from
                        Scott Hutton and Jeff Sumler of Indiana University.
                Cray CSOS from Scott Bolte of Cray Computer Corporation.
                Unicos 8.0 from Douglas K. Rand of the University of North
                        Dakota, Scientific Computing Center.
                Solaris 2.4 fixes from Sanjay Dani of Dani Communications.
                ConvexOS 11.0 from Christophe Wolfhugel.
                IRIX 4.0.5 from David Ashton-Reader of CADcentre.
                ISC UNIX from J. J. Bailey.
                HP-UX 9.xx on the 8xx series machines from Remy Giraud
                        of Meteo France.
                HP-UX configuration from Tom Lane <tgl@sss.pgh.pa.us>.
                IRIX 5.2 and 5.3 from Kari E. Hurtta.
                FreeBSD 2.0 from Mike Hickey of Federal Data Corporation.
                Sony NEWS-OS 4.2.1R and 6.0.3 from Motonori Nakamura.
                Omron LUNA unios-b, mach from Motonori Nakamura.
                NEC EWS-UX/V 4.2 from Motonori Nakamura.
                NeXT 2.1 from Bryan Costales.
                AUX patch thanks to Mike Erwin of Apple Computer.
                HP-UX 10.0 from John Beck of Hewlett-Packard.
                Ultrix: allow -DBROKEN_RES_SEARCH=0 if you are using a
                        non-DEC resolver.  Suggested by Allan Johannesen.
                UnixWare 2.0 fixes from Petr Lampa of the Technical
                        University of Brno (Czech Republic).
                KSR OS 1.2.2 support from Todd Miller of the University
                        of Colorado.
                UX4800 support from Kazuhisa Shimizu of NEC.
        MAKEMAP: allow -d flag to allow insertion of duplicate aliases
                in type ``btree'' maps.  The semantics of this are undefined
                for regular maps, but it can be useful for the user database.
        MAKEMAP: lock database file while rebuilding to avoid sendmail
                lookups while the rebuild is going on.  There is a race
                condition between the open(... O_TRUNC ...) and the lock
                on the file, but it should be quite small.
        SMRSH: sendmail restricted shell added to the release.  This can
                be used as an alternative to /bin/sh for the "prog" mailer,
                giving the local administrator more control over what
                programs can be run from sendmail.
        MAIL.LOCAL: add this local mailer to the tape.  It is not really
                part of the release proper, and isn't fully supported; in
                particular, it does not run on System V based systems and
                never will.
        CONTRIB: a patch to rmail.c from Bill Gianopoulos of Raytheon
                to allow rmail to compile on systems that don't have
                function prototypes and systems that don't have snprintf.
        CONTRIB: add the "mailprio" scripts that will help you sort mailing
                lists by transaction delay times so that addresses that
                respond quickly get sent first.  This is to prevent very
                sluggish servers from delaying other peoples' mail.
                Contributed by Tony Sanders of BSDI.
        CONTRIB: add the "bsdi.mc" file as contributed by Tony Sanders
                of BSDI.  This has a lot of comments to help people out.
        CONFIG: Don't have .mc files include(../m4/cf.m4) -- instead,
                put this on the m4 command line.  On GNU m4 (which
                supports the __file__ primitive) you can run m4 in an
                arbitrary directory -- use either:
                        m4 ${CFDIR}/m4/cf.m4 config.mc > config.cf
                or
                        m4 -I${CFDIR} m4/cf.m4 config.mc > config.cf
                On other versions of m4 that don't support __file__, you
                can use:
                        m4 -D_CF_DIR_=${CFDIR}/ ${CFDIR}/m4/cf.m4 ...
                (Note the trailing slash on the _CF_DIR_ definition.)
                Old versions of m4 will default to _CF_DIR_=.. for back
                compatibility.
        CONFIG: fix mail from <> so it will properly convert to
                MAILER-DAEMON on local addresses.
        CONFIG: fix code that was supposed to catch colons in host
                names.  Problem noted by John Gardiner Myers of CMU.
        CONFIG: allow use of SMTP_MAILER_MAX in nullclient configuration.
                From Paul Riddle of the University of Maryland, Baltimore
                County.
        CONFIG: Catch and reject "." as a host address.
        CONFIG: Generalize domaintable to look up all domains, not
                just unqualified ones.
        CONFIG: Delete OLD_SENDMAIL support -- as near as I can tell, it
                was never used and didn't work anyway.
        CONFIG: Set flags A, w, 5, :, /, |, and @ on the "local" mailer
                and d on all mailers in the UUCP class.
        CONFIG: Allow "user+detail" to be aliased specially: it will first
                look for an alias for "user+detail", then for "user+*", and
                finally for "user".  This is intended for forwarding mail
                for system aliases such as root and postmaster to a
                centralized hub.
        CONFIG: add confEIGHT_BIT_HANDLING to set option 8 (see above).
        CONFIG: add smtp8 mailer; this has the F=8 (just-send-8) flag set.
                The F=8 flag is also set on the "relay" mailer, since
                this is expected to be another sendmail.
        CONFIG: avoid qualifying all UUCP addresses sent via SMTP with
                the name of the UUCP_RELAY -- in some cases, this is the
                wrong value (e.g., when we have local UUCP connections),
                and this can create unreplyable addresses.  From Chip
                Rosenthal of Unicom.
        CONFIG: add confRECEIVED_HEADER to change the format of the
                Received: header inserted into all messages.  Suggested by
                Gary Mills of the University of Manitoba.
        CONFIG: Make "notsticky" the default; use FEATURE(stickyhost)
                to get the old behavior.  I did this upon observing
                that almost everyone needed this feature, and that the
                concept I was trying to make happen didn't work with
                some user agents anyway.  FEATURE(notsticky) still works,
                but it is a no-op.
        CONFIG: Add LUSER_RELAY -- the host to which unrecognized user
                names are sent, rather than immediately diagnosing them
                as User Unknown.
        CONFIG: Add SMTP_MAILER_ARGS, ESMTP_MAILER_ARGS, SMTP8_MAILER_ARGS,
                and RELAY_MAILER_ARGS to set the arguments for the
                indicated mailers.  All default to "IPC $h".  Patch from
                Larry Parmelee of Cornell University.
        CONFIG: pop mailer needs F=n flag to avoid "annoying side effects
                on the client side" and F=P to get an appropriate
                return-path.  From Kimmo Suominen.
        CONFIG: add FEATURE(local_procmail) to use the procmail program
                as the local mailer.  For addresses of the form "user+detail"
                the "detail" part is passed to procmail via the -a flag.
                Contributed by Kimmo Suominen.
        CONFIG: add MAILER(procmail) to add an interface to procmail for
                use from mailertables.  This lets you execute arbitrary
                procmail scripts.  Contributed by Kimmo Suominen.
        CONFIG: add T= fields (MTS type) to local, smtp, and uucp mailers.
        CONFIG: add OSTYPE(ptx2) for DYNIX/ptx 2.x from Sequent.  From
                Paul Southworth of CICNet Systems Support.
        CONFIG: use -a$g as default to UUCP mailers, instead of -a$f.
                This causes the null return path to be rewritten as
                MAILER-DAEMON; otherwise UUCP gets horribly confused.
                From Michael Hohmuth of Technische Universitat Dresden.
        CONFIG: Add FEATURE(bestmx_is_local) to cause any hosts that
                list us as the best possible MX record to be treated as
                though they were local (essentially, assume that they
                are included in $=w).  This can cause additional DNS
                traffic, but is easier to administer if this fits your
                local model.  It does not work reliably if there are
                multiple hosts that share the best MX preference.
                Code contributed by John Oleynick of Rutgers.
        CONFIG: Add FEATURE(smrsh) to use smrsh (the SendMail Restricted
                SHell) instead of /bin/sh as the program used for delivery
                to programs.  If an argument is included, it is used as
                the path to smrsh; otherwise, /usr/local/etc/smrsh is
                assumed.
        CONFIG: Add LOCAL_MAILER_MAX and PROCMAILER_MAILER_MAX to limit the
                size of messages to the local and procmail mailers
                respectively.  Contributed by Brad Knowles of the Defense
                Information Systems Agency.
        CONFIG: Handle leading ``phrase:'' and trailing ``;'' as comments
                (just like text outside of angle brackets) in order to
                properly deal with ``group: addr1, ... addrN;'' syntax.
        CONFIG: Require OSTYPE macro (the defaults really don't apply to
                any real systems any more) and tweak the DOMAIN macro
                so that it is less likely that users will accidentally use
                the Berkeley defaults.  Also, create some generic files
                that really can be used in the real world.
        CONFIG: Add new configuration macros to set character sets for
                messages _arriving from_ various mailers: LOCAL_MAILER_CHARSET,
                SMTP_MAILER_CHARSET, and UUCP_MAILER_CHARSET.
        CONFIG: Change UUCP_MAX_SIZE to UUCP_MAILER_MAX for consistency.
                The old name will still be accepted for a while at least.
        CONFIG: Implement DECNET_RELAY as spec for host to which DECNET
                mail (.DECNET pseudo-domain or node::user) will be sent.
                As with all relays, it can be ``mailer:hostname''.  Suggested
                by Scott Hutton.
        CONFIG: Add MAILER(mail11) to get DECnet support.  Code contributed
                by Barb Dijker of Labyrinth Computer Services.
        CONFIG: change confCHECK_ALIASES to default to False -- it has poor
                performance for large alias files, and this confused many
                people.
        CONFIG: Add confCF_VERSION to append local information to the
                configuration version number displayed during SMTP startup.
        CONFIG: fix some.newsgroup.usenet@local.host syntax (previously it
                would only work when locally addressed.  Fix from
                Edvard Tuinder of Cistron Internet Services.
        CONFIG: use ${opMode} to avoid error on .REDIRECT addresses if option
                "n" (CheckAliases) is set when rebuilding alias database.
                Based on code contributed by Claude Marinier.
        CONFIG: Allow mailertable to have values of the form
                ``error:code message''.  The ``code'' is a status code
                derived from the sysexits codes -- e.g., NOHOST or UNAVAILABLE.
                Contributed by David James <dwj@agw.bt.co.uk>.
        CONFIG: add MASQUERADE_DOMAIN(domain list) to extend the list of
                sender domains that will be replaced with the masquerade name.
                These domains will not be treated as local, but if mail passes
                through with sender addresses in those domains they will be
                replaced by the masquerade name.  These can also be specified
                in a file using MASQUERADE_DOMAIN_FILE(filename).
        CONFIG: add FEATURE(masquerade_envelope) to masquerade the envelope
                as well as the header.  Substantial improvements to this
                code were contributed by Per Hedeland.
        CONFIG: add MAILER(phquery) to define a new "ph" mailer; this can be
                accessed from a mailertable to do CCSO ph lookups.  Contributed
                by Kimmo Suominen.
        CONFIG: add MAILER(cyrus) to define a new Cyrus mailer; this can be
                used to define cyrus and cyrusbb mailers (for IMAP support).
                Contributed by John Gardiner Myers of Carnegie Mellon.
        CONFIG: add confUUCP_MAILER to select default mailer to use for
                UUCP addressing.  Suggested by Tom Moore of AT&T GIS.
        NEW FILES:
                cf/cf/cs-hpux10.mc
                cf/cf/cs-solaris2.mc
                cf/cf/cyrusproto.mc
                cf/cf/generic-bsd4.4.mc
                cf/cf/generic-hpux10.mc
                cf/cf/generic-hpux9.mc
                cf/cf/generic-osf1.mc
                cf/cf/generic-solaris2.mc
                cf/cf/generic-sunos4.1.mc
                cf/cf/generic-ultrix4.mc
                cf/cf/huginn.cs.mc
                cf/domain/berkeley-only.m4
                cf/domain/generic.m4
                cf/feature/bestmx_is_local.m4
                cf/feature/local_procmail.m4
                cf/feature/masquerade_envelope.m4
                cf/feature/smrsh.m4
                cf/feature/stickyhost.m4
                cf/feature/use_ct_file.m4
                cf/m4/cfhead.m4
                cf/mailer/cyrus.m4
                cf/mailer/mail11.m4
                cf/mailer/phquery.m4
                cf/mailer/procmail.m4
                cf/ostype/amdahl-uts.m4
                cf/ostype/bsdi2.0.m4
                cf/ostype/hpux10.m4
                cf/ostype/irix5.m4
                cf/ostype/isc4.1.m4
                cf/ostype/ptx2.m4
                cf/ostype/unknown.m4
                contrib/bsdi.mc
                contrib/mailprio
                contrib/rmail.oldsys.patch
                mail.local/mail.local.0
                makemap/makemap.0
                smrsh/README
                smrsh/smrsh.0
                smrsh/smrsh.8
                smrsh/smrsh.c
                src/Makefiles/Makefile.CSOS
                src/Makefiles/Makefile.EWS-UX_V
                src/Makefiles/Makefile.HP-UX.10
                src/Makefiles/Makefile.IRIX.5.x
                src/Makefiles/Makefile.IRIX64
                src/Makefiles/Makefile.ISC
                src/Makefiles/Makefile.KSR
                src/Makefiles/Makefile.NEWS-OS.4.x
                src/Makefiles/Makefile.NEWS-OS.6.x
                src/Makefiles/Makefile.NEXTSTEP
                src/Makefiles/Makefile.NonStop-UX
                src/Makefiles/Makefile.Paragon
                src/Makefiles/Makefile.SCO.3.2v4.2
                src/Makefiles/Makefile.SunOS.5.3
                src/Makefiles/Makefile.SunOS.5.4
                src/Makefiles/Makefile.SunOS.5.5
                src/Makefiles/Makefile.UNIX_SV.4.x.i386
                src/Makefiles/Makefile.uts.systemV
                src/Makefiles/Makefile.UX4800
                src/aliases.0
                src/mailq.0
                src/mime.c
                src/newaliases.0
                src/sendmail.0
                test/t_seteuid.c
        RENAMED FILES:
                cf/cf/alpha.mc =>               cf/cf/s2k-osf1.mc
                cf/cf/chez.mc =>                cf/cf/chez.cs.mc
                cf/cf/hpux-cs-exposed.mc =>     cf/cf/cs-hpux9.mc
                cf/cf/osf1-cs-exposed.mc =>     cf/cf/cs-osf1.mc
                cf/cf/s2k.mc =>                 cf/cf/s2k-ultrix4.mc
                cf/cf/sunos4.1-cs-exposed.mc => cf/cf/cs-sunos4.1.mc
                cf/cf/ultrix4.1-cs-exposed.mc => cf/cf/cs-ultrix4.mc
                cf/cf/vangogh.mc =>             cf/cf/vangogh.cs.mc
                cf/domain/Berkeley.m4 =>        cf/domain/Berkeley.EDU.m4
                cf/domain/cs-exposed.m4 =>      cf/domain/CS.Berkeley.EDU.m4
                cf/domain/eecs-hidden.m4 =>     cf/domain/EECS.Berkeley.EDU.m4
                cf/domain/s2k.m4 =>             cf/domain/S2K.Berkeley.EDU.m4
                cf/ostype/hpux.m4 =>            cf/ostype/hpux9.m4
                cf/ostype/irix.m4 =>            cf/ostype/irix4.m4
                cf/ostype/ultrix4.1.m4 =>       cf/ostype/ultrix4.m4
                src/Makefile.* =>               src/Makefiles/Makefile.*
                src/Makefile.AUX =>             src/Makefiles/Makefile.A-UX
                src/Makefile.BSDI =>            src/Makefiles/Makefile.BSD-OS
                src/Makefile.DGUX =>            src/Makefiles/Makefile.dgux
                src/Makefile.RISCos =>          src/Makefiles/Makefile.UMIPS
                src/Makefile.SunOS.4.0.3 =>     src/Makefiles/Makefile.SunOS.4.0
        OBSOLETED FILES:
                cf/cf/cogsci.mc
                cf/cf/cs-exposed.mc
                cf/cf/cs-hidden.mc
                cf/cf/hpux-cs-hidden.mc
                cf/cf/knecht.mc
                cf/cf/osf1-cs-hidden.mc
                cf/cf/sunos3.5-cs-exposed.mc
                cf/cf/sunos3.5-cs-hidden.mc
                cf/cf/sunos4.1-cs-hidden.mc
                cf/cf/ultrix4.1-cs-hidden.mc
                cf/domain/cs-hidden.m4
                contrib/rcpt-streaming
                src/Makefiles/Makefile.SunOS.5.x

8.6.13/8.6.12   1996/01/25
        SECURITY: In some cases it was still possible for an attacker to
                insert newlines into a queue file, thus allowing access to
                any user (except root).
        CONFIG: no changes -- it is not a bug that the configuration
                version number is unchanged.

8.6.12/8.6.12   1995/03/28
        Fix to IDENT code (it was getting the size of the reply buffer
                too small, so nothing was ever accepted).  Fix from several
                people, including Allan Johannesen, Shane Castle of the
                Boulder County Information Services, and Jeff Smith of
                Warwick University (all arrived within a few hours of
                each other!).
        Fix a problem that could cause large jobs to run out of
                file descriptors on systems that use vfork() rather
                than fork().

8.6.11/8.6.11   1995/03/08
        The ``possible attack'' message would be logged more often
                than necessary if you are using Pine as a user agent.
        The wrong host would be reported in the ``possible attack''
                message when attempted from IDENT.
        In some cases the syslog buffer could be overflowed when
                reporting the ``possible attack'' message.  This can
                cause denial of service attacks.  Truncate the message
                to 80 characters to prevent this problem.
        When reading the IDENT response a loop is needed around the
                read from the network to ensure that you don't get
                partial lines.
        Password entries without any shell listed (that is, a null
                shell) wouldn't match as "ok".  Problem noted by
                Rob McMahon.
        When running BIND 4.9.x a problem could occur because the
                _res.options field is initialized differently than it
                was historically -- this requires that sendmail call
                res_init before it tweaks any bits.
        Fix an incompatibility in openxscript() between the file open mode
                and the stdio mode passed to fdopen.  This caused UnixWare
                2.0 to have conniptions.  Fix from Martin Sohnius of
                Novell Labs Europe.
        Fix problem with static linking of local getopt routine when
                using GNU's ld command.  Fix from John Kennedy of
                Cal State Chico.
        It was possible to turn off privacy flags.  Problem noted by
                *Hobbit*.
        Be more paranoid about writing files.  Suggestions by *Hobbit*
                and Liudvikas Bukys.
        MAKEMAP: fixes for 64 bit machines (DEC Alphas in particular)
                from Spider Boardman.
        CONFIG: No changes (version number only, to keep it in sync
                with the binaries).

8.6.10/8.6.10   1995/02/10
        SECURITY: Diagnose bogus values to some command line flags that
                could allow trash to get into headers and qf files.
        Validate the name of the user returned by the IDENT protocol.
                Some systems that really dislike IDENT send intentionally
                bogus information.  Problem pointed out by Michael Bushnell
                of the Free Software Foundation.  Has some security
                implications.
        Fix a problem causing error messages about DNS problems when
                the host name contained a percent sign to act oddly
                because it was passed as a printf-style format string.
                In some cases this could cause core dumps.
        Avoid possible buffer overrun in returntosender() if error
                message is quite long.  From Fletcher Mattox of the
                University of Texas.
        Fix a problem that would silently drop "too many hops" error
                messages if and only if you were sending to an alias.
                From Jon Giltner of the University of Colorado and
                Dan Harton of Oak Ridge National Laboratory.
        Fix a bug that caused core dumps on some systems if -d11.2 was
                set and e->e_message was null.  Fix from Bruce Nagel of
                Data General.
        Fix problem that can still cause df files to be left around
                after "hop count exceeded" messages.  Fix from Andrew
                Chang and Shau-Ping Lo of SunSoft.
        Fix a problem that can cause buffer overflows on very long
                user names (as might occur if you piped to a program
                with a lot of arguments).
        Avoid returning an error and re-queueing if the host signature
                is null; this can occur on addresses like ``user@.''.
                Problem noted by Wesley Craig and the University of
                Michigan.
        Avoid possible calls to malloc(0) if MCI caching is turned
                off.  Bug fix from Pierre David of the Laboratoire
                Parallelisme, Reseaux, Systemes et Modelisation (PRiSM),
                Universite de Versailles - St Quentin, and Jacky
                Thibault.
        Make a local copy of the line being sent via senttolist() -- in
                some cases, buffers could get trashed by map lookups
                causing it to do unexpected things.  This also simplifies
                some of the map code.
        CONFIG: No changes (version number only, to keep it in sync
                with the binaries).

8.6.9/8.6.9     1994/04/19
        Do all mail delivery completely disconnected from any terminal.
                This provides consistency with daemon delivery and
                may have some security implications.
        Make sure that malloc doesn't get called with zero size,
                since that fails on some systems.  Reported by Ed
                Hill of the University of Iowa.
        Fix multi-line values for $e (SMTP greeting message).  Reported
                by Mike O'Connor of Ford Motor Company.
        Avoid syserr if no NIS domain name is defined, but the map it
                is trying to open is optional.  From Win Bent of USC.
        Changes for picky compilers from Ed Gould of Digital Equipment.
        Hesiod support for UDB from Todd Miller of the University of
                Colorado.  Use "hesiod" as the service name in the U
                option.
        Fix a problem that failed to set the "authentic" host name (that
                is, the one derived from the socket info) if you called
                sendmail -bs from inetd.  Based on code contributed by
                Todd Miller (this problem was also reported by Guy Helmer
                of Dakota State University).  This also fixes a related
                problem reported by Liudvikas Bukys of the University of
                Rochester.
        Parameterize "nroff -h" in all the Makefiles so people with
                variant versions can use them easily.  Suggested by
                Peter Collinson of Hillside Systems.
        SMTP "MAIL" commands with multiple ESMTP parameters required two
                spaces between parameters instead of one.  Reported by
                Valdis Kletnieks of Virginia Tech.
        Reduce the number of system calls during message collection by
                using global timeouts around the collect() loop.  This
                code was contributed by Eric Wassenaar.
        If the initial hostname name gathering results in a name
                without a dot (usually caused by NIS misconfiguration)
                and BIND is compiled in, directly access DNS to get
                the canonical name.  This should make life easier for
                Solaris systems.  If it still can't be resolved, and
                if the name server is listed as "required", try again
                in 30 seconds.  If that also fails, exit immediately to
                avoid bogus "config error: mail loops back to myself"
                messages.
        Improve the "MAIL DELETED BECAUSE OF LACK OF DISK SPACE" error
                message to explain how much space was available and
                sound a bit less threatening.  Suggested by Stan Janet
                of the National Institute of Standards and Technology.
        If mail is delivered to an alias that has an owner, deliver any
                requested return-receipt immediately, and strip the
                Return-Receipt-To: header from the subsequent message.
                This prevents a certain class of denial of service
                attack, arguably gives more reasonable semantics, and
                moves things more towards what will probably become a
                network standard.  Suggested by Christopher Davis of
                Kapor Enterprises.
        Add a "noreceipts" privacy flag to turn off all return receipts
                without recompiling.
        Avoid printing ESMTP parameters as part of the error message
                if there are errors during parsing.  This change is
                purely cosmetic.
        Avoid sending out error messages during the collect phase of
                SMTP; there is an MVS mailer from UCLA that gets
                confused by this.  Of course, I think it's their bug....
        Check for the $j macro getting undefined, losing a dot, or getting
                lost from $=w in the daemon before accepting a connection;
                if it is, it dumps state, prints a LOG_ALERT message,
                and drops core for debugging.  This is an attempt to
                track down a bug that I thought was long since gone.
                If you see this, please forward the log fragment to
                sendmail@sendmail.ORG.
        Change OLD_NEWDB from a #ifdef to a #if so it can be turned off
                with -DOLD_NEWDB=0 on the command line.  From Christophe
                Wolfhugel.
        Instead of trying to truncate the listen queue for the server
                SMTP port when the load average is too high, just close
                the port completely and reopen it later as needed.
                This ensures that the other end gets a quick "connection
                refused" response, and that the connection can be
                recovered later.  In particular, some socket emulations
                seem to get confused if you tweak the listen queue
                size around and can never start listening to connections
                again.  The down side is that someone could start up
                another daemon process in the interim, so you could
                have multiple daemons all not listening to connections;
                this could in turn cause the sendmail.pid file to be
                incorrect.  A better approach might be to accept the
                connection and give a 421 code, but that could break
                other mailers in mysterious ways and have paging behavior
                implications.
        Fix a glitch in TCP-level debugging that caused flag 16.101 to
                set debugging on the wrong socket.  From Eric Wassenaar.
        When creating a df* temporary file, be sure you truncate any
                existing data in the file -- otherwise system crashes
                and the like could result in extra data being sent.
        DOC: Replace the CHANGES-R5-R8 readme file with a paper in the
                doc directory.  This includes some additional
                information.
        CONFIG: change UUCP rules to never add $U! or $k! on the front
                of recipient envelope addresses.  This should have been
                handled by the $&h trick, but broke if people were
                mixing domainized and UUCP addresses.  They should
                probably have converted all the way over to uucp-uudom
                instead of uucp-{new,old}, but the failure mode was to
                loop the mail, which was bad news.
        Portability fixes:
                Newer BSDI systems (several people).
                Older BSDI systems from Christophe Wolfhugel.
                Intergraph CLIX, from Paul Southworth of CICNet.
                UnixWare, from Evan Champion.
                NetBSD from Adam Glass.
                Solaris from Quentin Campbell of the University of
                        Newcastle upon Tyne.
                IRIX from Dean Cookson and Bill Driscoll of Mitre
                        Corporation.
                NCR 3000 from Kevin Darcy of Chrysler Financial Corporation.
                SunOS (it has setsid() and setvbuf() calls) from
                        Jonathan Kamens of OpenVision Technologies.
                HP-UX from Tor Lillqvist.
        New Files:
                src/Makefile.CLIX
                src/Makefile.NCR3000
                doc/changes/Makefile
                doc/changes/changes.me
                doc/changes/changes.ps

8.6.8/8.6.6     1994/03/21
        SECURITY: it was possible to read any file as root using the
                E (error message) option.  Reported by Richard Jones;
                fixed by Michael Corrigan and Christophe Wolfhugel.

8.6.7/8.6.6     1994/03/14
        SECURITY: it was possible to get root access by using weird
                values to the -d flag.  Thanks to Alain Durand of
                INRIA for forwarding me the notice from the bugtraq
                list.

8.6.6/8.6.6     1994/03/13
        SECURITY: the ability to give files away on System V-based
                systems proved dangerous -- don't run as the owner
                of a :include: file on a system that allows giveaways.
                Unfortunately, this also applies to determining a
                valid shell.
        IMPORTANT: Previous versions weren't expiring old connections
                in the connection cache for a long time under some
                circumstances.  This could result in resource exhaustion,
                both at your end and at the other end.  This checks the
                connections for timeouts much more frequently.  From
                Doug Anderson of NCSC.
        Fix a glitch that snuck in that caused programs to be run as
                the sender instead of the recipient if the mail was
                from a local user to another local user.  From
                Motonori Nakamura of Kyoto University.
        Fix "wildcard" on /etc/shells matching -- instead of looking
                for "*", look for "/SENDMAIL/ANY/SHELL/".  From
                Bryan Costales of ICSI.
        Change the method used to declare the "statfs" availability;
                instead of HASSTATFS and/or HASUSTAT with a ton of
                tweaking in conf.c, there is a single #define called
                SFS_TYPE which takes on one of six values (SFS_NONE
                for no statfs availability, SFS_USTAT for the ustat(2)
                syscall, SFS_4ARGS for a four argument statfs(2) call,
                and SFS_VFS, SFS_MOUNT, or SFS_STATFS for a two argument
                statfs(2) call with the declarations in <sys/vfs.h>,
                <sys/mount.h>, or <sys/statfs.h> respectively).
        Fix glitch in NetInfo support that could return garbage if
                there was no "/locations/sendmail" property.  From
                David Meyer of the University of Virginia.
        Change HASFLOCK from defined/not-defined to a 0/1 definition
                to allow Linux to turn it off even though it is a
                BSD-like system.
        Allow setting of "ident" timeout to zero to turn off the ident
                protocol entirely.
        Make 7-bit stripping local to a connection (instead of to a
                mailer); this allows you to specify that SMTP is a
                7-bit channel, but revert to 8-bit should it advertise
                that it supports 8BITMIME.  You still have to specify
                mailer flag 7 to get this stripping at all.
        Improve makesendmail script so it handles more cases automatically.
        Tighten up restrictions on taking ownership of :include: files
                to avoid problems on systems that allow you to give away
                files.
        Fix a problem that made it impossible to rebuild the alias
                file if it was on a read-only file system.  From
                Harry Edmon of the University of Washington.
        Improve MX randomization function.  From John Gardiner Myers
                of CMU.
        Fix a minor glitch causing a bogus message to be printed (used
                %s instead of %d in a printf string for the line number)
                when a bad queue file was read.  From Harry Edmon.
        Allow $s to remain NULL on locally generated mail.  I'm not
                sure this is necessary, but a lot of people have complained
                about it, and there is a legitimate question as to whether
                "localhost" is legal as an 822-style domain.
        Fix a problem with very short line lengths (mailer L= flag) in
                headers.  This causes a leading space to be added onto
                continuation lines (including in the body!), and also
                tries to wrap headers containing addresses (From:, To:,
                etc) intelligently at the shorter line lengths.  Problem
                Reported by Lars-Johan Liman of SUNET Operations Center.
        Log the real user name when logging syserrs, since these can have
                security implications.  Suggested by several people.
        Fix address logging of cached connections -- it used to always
                log the numeric address as zero.  This is a somewhat
                bogus implementation in that it does an extra system
                call, but it should be an inexpensive one.  Fix from
                Motonori Nakamura.
        Tighten up handling of short syslog buffers even more -- there
                were cases where the outgoing relay= name was too long
                to share a line with delay= and mailer= logging.
        Limit the overhead on split envelopes to one open file descriptor
                per envelope -- previously the overhead was three
                descriptors.  This was in response to a problem reported
                by P{r (Pell) Emanuelsson.
        Fixes to better handle the case of unexpected connection closes;
                this redirects the output to the transcript so the info
                is not lost.  From Eric Wassenaar.
        Fix potential string overrun if you macro evaluate a string that
                has a naked $ at the end.  Problem noted by James Matheson
                <jmrm@eng.cam.ac.uk>.
        Make default error number on $#error messages 553 (``Requested
                action not taken: mailbox name not allowed'') instead of
                501 (``Syntax error in parameters or arguments'') to
                avoid bogus "protocol error" messages.
        Strip off any existing trailing dot on names during $[ ... $]
                lookup.  This prevents it from ending up with two dots
                on the end of dot terminated names.  From Wesley Craig
                of the University of Michigan and Bryan Costales of ICSI.
        Clean up file class reading so that the debugging information is
                more informative.  It hadn't been using setclass, so you
                didn't see the class items being added.
        Avoid core dump if you are running a version of sendmail where
                NIS is compiled in, and you specify an NIS map, but
                NIS is not running.  Fix from John Oleynick of
                Rutgers.
        Diagnose bizarre case where res_search returns a failure value,
                but sets h_errno to a success value.
        Make sure that "too many hops" messages are considered important
                enough to send an error to the Postmaster (that is, the
                address specified in the P option).  This fix should
                help problems that cause the df file to be left around
                sometimes -- unfortunately, I can't seem to reproduce
                the problem myself.
        Avoid core dump (null pointer reference) on EXPN command; this
                only occurred if your log level was set to 10 or higher
                and the target account was an alias or had a .forward file.
                Problem noted by Janne Himanka.
        Avoid "denial of service" attacks by someone who is flooding your
                SMTP port with bad commands by shutting the connection
                after 25 bad commands are issued.  From Kyle Jones of
                UUNET.
        Fix core dump on error messages with very long "to" buffers;
                fmtmsg overflows the message buffer.  Fixed by trimming
                the to address to 203 characters.  Problem reported by
                John Oleynick.
        Fix configuration for HASFLOCK -- there were some spots where
                a #ifndef was incorrectly #ifdef.  Pointed out by
                George Baltz of the University of Maryland.
        Fix a typo in savemail() that could cause the error message To:
                lists to be incorrect in some places.  From Motonori
                Nakamura.
        Fix a glitch that can cause duplicate error messages on split
                envelopes where an address on one of the lists has a
                name server failure.  Fix from Voradesh Yenbut of the
                University of Washington.
        Fix possible bogus pointer reference on ESMTP parameters that
                don't have an ``=value'' part.
        CNAME loops caused an error message to be generated, but also
                re-queued the message.  Changed to just re-queue the
                message (it's really hard to just bounce it because
                of the weird way the name server works in the presence
                of CNAME loops).  Problem noted by James M.R.Matheson
                of Cambridge University.
        Avoid giving ``warning: foo owned process doing -bs'' messages
                if they use ``MAIL FROM:<foo>'' where foo is their true
                user name.  Suggested by Andreas Stolcke of ICSI.
        Change the NAMED_BIND compile flag to be a 0/1 flag so you can
                override it easily in the Makefile -- that is, you can
                turn it off using -DNAMED_BIND=0.
        If a gethostbyname(...) of an address with a trailing dot fails,
                try it without the trailing dot.  This is because if
                you have a version of gethostbyname() that falls back
                to NIS or the /etc/hosts file it will fail to find
                perfectly reasonable names that just don't happen to
                be dot terminated in the hosts file.  You don't want to
                strip the dot first though because we're trying to ensure
                that country names that match one of your subdomains get
                a chance.
        PRALIASES: fix bogus output on non-null-terminated strings.
                From Bill Gianopoulos of Raytheon.
        CONFIG: Avoid rewriting anything that matches $w to be $j.
                This was in code intended to only catch the self-literal
                address (that is, [1.2.3.4], where 1.2.3.4 is your
                IP address), but the code was broken.  However, it will
                still do this if $M is defined; this is necessary to
                get client configurations to work (sigh).  Note that this
                means that $M overrides :mailname entries in the user
                database!  Problem noted by Paul Southworth.
        CONFIG: Fix definition of Solaris help file location.  From
                Steve Cliffe <steve@gorgon.cs.uow.edu.au>.
        CONFIG: Fix bug that broke news.group.USENET mappings.
        CONFIG: Allow declaration of SMTP_MAILER_MAX, FAX_MAILER_MAX,
                and USENET_MAILER_MAX to tweak the maximum message
                size for various mailers.
        CONFIG: Change definition of USENET_MAILER_ARGS to include argv[0]
                instead of assuming that it is "inews" for consistency
                with other mailers.  From Michael Corrigan of UC San Diego.
        CONFIG: When mail is forwarded to a LOCAL_RELAY or a MAIL_HUB,
                qualify the address in the SMTP envelope as user@{relay|hub}
                instead of user@$j.  From Bill Wisner of The Well.
        CONFIG: Fix route-addr syntax in nullrelay configuration set.
        CONFIG: Don't turn off case mapping of user names in the local
                mailer for IRIX.  This was different than most every other
                system.
        CONFIG: Avoid infinite loops on certainly list:; syntaxes in
                envelope.  Noted by Thierry Besancon
                <besancon@excalibur.ens.fr>.
        CONFIG: Don't include -z by default on uux line -- most systems
                don't want it set by default.  Pointed out by Philippe
                Michel of Thomson CSF.
        CONFIG: Fix some bugs with mailertables -- for example, if your
                host name was foo.bar.ray.com and you matched against
                ".ray.com", the old implementation bound %1 to "bar"
                instead of "foo.bar".  Also, allow "." in the mailertable
                to match anything -- essentially, take over SMART_HOST.
                This also moves matching of explicit local host names
                before the mailertable so they don't have to be special
                cased in the mailertable data.  Reported by Bill
                Gianopoulos of Raytheon; the fix for the %1 binding
                problem was contributed by Nicholas Comanos of the
                University of Sydney.
        CONFIG: Don't include "root" in class $=L (users to deliver
                locally, even if a hub or relay exists) by default.
                This is because of the known bug where definition of
                both a LOCAL_RELAY and a MAIL_HUB causes $=L to ignore
                both and deliver into the local mailbox.
        CONFIG: Move up bitdomain and uudomain handling so that they
                are done before .UUCP class matching; uudomain was
                reported as ineffective before.  This also frees up
                diversion 8 for future use.  Problem reported by Kimmo
                Suominen.
        CONFIG: Don't try to convert dotted IP address (e.g., [1.2.3.4])
                into host names.  As pointed out by Jonathan Kamens,
                these are often used because either the forward or reverse
                mapping is broken; this translation makes it broken again.
        DOC: Clarify $@ and $: in the Install & Op Guide.  From Kimmo
                Suominen.
        Portability fixes:
                Unicos from David L. Kensiski of Sterling Software.
                DomainOS from Don Lewis of Silicon Systems.
                GNU m4 1.0.3 from Karst Koymans of Utrecht University.
                Convex from Kimmo Suominen <kim@tac.nyc.ny.us>.
                NetBSD from Adam Glass <glass@sun-lamp.cs.berkeley.edu>.
                BSD/386 from Tony Sanders of BSDI.
                Apollo from Eric Wassenaar.
                DGUX from Doug Anderson.
                Sequent DYNIX/ptx 2.0 from Tim Wright of Sequent.
        NEW FILES:
                src/Makefile.DomainOS
                src/Makefile.PTX
                src/Makefile.SunOS.5.1
                src/Makefile.SunOS.5.2
                src/Makefile.SunOS.5.x
                src/mailq.1
                cf/ostype/domainos.m4
                doc/op/Makefile
                doc/intro/Makefile
                doc/usenix/Makefile

8.6.5/8.6.5     1994/01/13
        Security fix:  /.forward could be owned by anyone (the test
                to allow root to own any file was backwards).  From
                Bob Campbell at U.C. Berkeley.
        Security fix: group ids were not completely set when programs
                were invoked.  This caused programs to have group
                permissions they should not have had (usually group
                daemon instead of their own group).  In particular,
                Perl scripts would refuse to run.
        Security: check to make sure files that are written are not
                symbolic links (at least under some circumstances).
                Although this does not respond to a specific known
                attack, it's just a good idea.  Suggested by
                Christian Wettergren.
        Security fix: if a user had an NFS mounted home directory on
                a system with a restricted shell listed in their
                /etc/passwd entry, they could still execute any
                program by putting that in their .forward file.
                This fix prevents that by insisting that their shell
                appear in /etc/shells before allowing a .forward to
                execute a program or write a file.  You can disable
                this by putting "*" in /etc/shells.  It also won't
                permit world-writable :include: files to reference
                programs or files (there's no way to disable this).
                These behaviors are only one level deep -- for
                example, it is legal for a world-writable :include:
                file to reference an alias that writes a file, on
                the assumption that the alias file is well controlled.
        Security fix: root was not treated suspiciously enough when
                looking into subdirectories.  This would potentially
                allow a cracker to examine files that were publicly
                readable but in a non-publicly searchable directory.
        Fix a problem that causes an error on QUIT on a cached
                connection to create problems on the current job.
                These are typically unrelated, so errors occur in
                the wrong place.
        Reset CurrentLA in sendall() -- this makes sendmail queue
                runs more responsive to load average, and fixes a
                problem that ignored the load average in locally
                generated mail.  From Eric Wassenaar.
        Fix possible core dump on aliases with null LHS.  From
                John Orthoefer of BB&N.
        Revert to using flock() whenever possible -- there are just
                too many bugs in fcntl() locking, particularly over
                NFS, that cause sendmail to fail in perverse ways.
        Fix a bug that causes the connection cache to get confused
                when sending error messages.  This resulted in
                "unexpected close" messages.  It should fix itself
                on the following queue run.  Problem noted by
                Liudvikas Bukys of the University of Rochester.
        Include $k in $=k as documented in the Install & Op Guide.
                This seems odd, but it was documented....  From
                Michael Corrigan of UCSD.
        Fix problem that caused :include:s from alias files to be
                forced to be owned by root instead of daemon
                (actually DefUid).  From Tim Irvin.
        Diagnose unrecognized I option values -- from Mortin Forssen
                of the Chalmers University of Technology.
        Make "error" mailer work consistently when there is no error
                code associated with it -- previously it returned OK
                even though there was a real problem.  Now it assumes
                EX_UNAVAILABLE.
        Fix bug that caused the last header line of messages that had
                no body and which were terminated with EOF instead of
                "." to be discarded.  Problem noted by Liudvikas Bukys.
        Fix core dump on SMTP mail to programs that failed -- it tried
                to go to a "next MX host" when none existed, causing
                a core dump.  From der Mouse at McGill University.
        Change IDENTPROTO from a defined/not defined to a 0/1 switch;
                this makes it easier to turn it off (using
                -DIDENTPROTO=0 in the Makefile).  From der Mouse.
        Fix YP_MASTER_NAME store to use the unupdated result of
                gethostname() (instead of myhostname(), which tries
                to fully qualify the name) to be consistent with
                SunOS.  If your hostname is unqualified, this fixes
                transfers to slave servers.  Bug noted by Keith
                McMillan of Ameritech Services, Inc.
        Fix Ultrix problem: gethostbyname() can return a very large
                (> 500) h_length field, which causes the sockaddr
                to be trashed.  Use the size of the sockaddr instead.
                Fix from Bob Manson of Ohio State.
        Don't assume "-a." on host lookups if NAMED_BIND is not
                defined -- this confuses gethostbyname on hosts
                file lookups, which doesn't understand the trailing
                dot convention.
        Log SMTP server subprocesses that die with a signal instead
                of from a clean exit.
        If you don't have option "I" set, don't assume that a DNS
                "host unknown" message is authoritative -- it
                might still be found in /etc/hosts.
        Fix a problem that would cause Deferred: messages to be sent
                as the subject of an error message, even though the
                actual cause of a message was more severe than that.
                Problem noted by Chris Seabrook of OSSI.
        Fix race condition in DBM alias file locking.  From Kyle
                Jones of UUNET.
        Limit delivery syslog line length to avoid bugs in some
                versions of syslog(3).  This adds a new compile time
                variable SYSLOG_BUFSIZE.  From Jay Plett of Princeton
                University, which is in turn derived from IDA.
        Fix quotes inside of comments in addresses -- previously
                it insisted that they be balanced, but the 822 spec
                says that they should be ignored.
        Dump open file state to syslog upon receiving SIGUSR1 (for
                debugging).  This also evaluates ruleset 89, if set
                (with the null input), and logs the result.  This
                should be used sparingly, since the rewrite process
                is not reentrant.
        Change -qI, -qR, and -qS flags to be case-insensitive as
                documented in the Bat Book.
        If the mailer returned EX_IOERR or EX_OSERR, sendmail did not
                return an error message and did not requeue the message.
                Fix based on code from Roland Dirlewanger of
                Reseau Regional Aquarel, Bordeaux, France.
        Fix a problem that caused a seg fault if you got a 421 error
                code during some parts of connection initialization.
                I've only seen this when talking to buggy mailers on
                the other end, but it shouldn't give a seg fault in
                any case.  From Amir Plivatsky.
        Fix core dump caused by a ruleset call that returns null.
                Fix from Bryan Costales of ICSI.
        Full-Name: field was being ignored.  Fix from Motonori Nakamura
                of Kyoto University.
        Fix a possible problem with very long input lines in setproctitle.
                From P{r Emanuelsson.
        Avoid putting "This is a warning message" out on return receipts.
                Suggested by Douglas Anderson.
        Detect loops caused by recursive ruleset calls.  Suggested by
                Bryan Costales.
        Initialize non-alias maps during alias rebuilds -- they may be
                needed for parsing.  Problem noted by Douglas Anderson.
        Log sender address even if no message was collected in SMTP
                (e.g., if all RCPTs failed).  Suggested by Motonori
                Nakamura.
        Don't reflect the owner-list contents into the envelope sender
                address if the value contains ", :, /, or | (to avoid
                illegal addresses appearing there).
        Efficiency hack for toktype macro -- from Craig Partridge of
                BB&N.
        Clean up DNS error printing so that a host name is always
                included.
        Remember to set $i during queue runs.  Reported by Stephen
                Campbell of Dartmouth University.
        If the environment variable HOSTALIASES is set, use it during
                canonification as the name of a file with per-user host
                translations so that headers are properly mapped.  Reported
                by Anne Bennett of Concordia University.
        Avoid printing misleading error message if SMTP mailer (not
                using [IPC]) should die on a core dump.
        Avoid incorrect diagnosis of "file 1 closed" when it is caused
                by the other end closing the connection.  From
                Dave Morrison of Oracle.
        Improve several of the error messages printed by "mailq"
                to include a host name or other useful information.
        Add NetInfo preliminary support for NeXT systems.  From Vince
                DeMarco.
        Fix a glitch that sometimes caused :include:s that pointed to
                NFS filesystems that were down to give an "aliasing/
                forwarding loop broken" message instead of queueing
                the message for retry.  Noted by William C Fenner of
                the NRL Connection Machine Facility.
        Fix a problem that could cause a core dump if the input sequence
                had (or somehow acquired) a \231 character.
        Make sure that route-addrs always have <angle brackets> around
                them in non-SMTP envelopes (SMTP envelopes already do
                this properly).
        Avoid weird headers on unbalanced punctuation of the form:
                ``Joe User <user)'' -- this caused reference to the
                null macro.  Fix from Rick McCarty of IO.COM.
        Fix a problem that caused an alias "user: user@local.host" to
                not have the QNOTREMOTE bit set; this caused configs
                to act as if FEATURE(notsticky) was defined even when
                it was not.  The effect of the problem was to make it
                very hard to to set up satellite sites that had a few
                local accounts, with everything else forwarded to a
                corporate hub.  Reported by Detlef Drewanz of the
                University of Rostock and Mark Frost of NCD.
        Change queuing to not call rulesets 3, {1 or 2}, 4 on header
                addresses.  This is more efficient (fewer name server
                calls) and fixes certain unusual configurations, such
                as those that have ruleset 4 do something that is
                non-idempotent unless a mailer-specific ruleset did
                something else.  Problem reported by Brian J. Coan
                of the Institute for Global Communications.
        Fix the "obsolete argument" routine in main to better understand
                new arguments.  For example, if you used ``sendmail
                -C config -v -q'' it would choke on the -q because
                the -C would stop looking for old-format arguments.
        Fix the code that was intended to allow two users to forward their
                mail to the same program and have them appear unique.
        Portability fixes for:
                SCO UNIX from Murray Kucherawy.
                SCO Open Server 3.2v4 from Philippe Brand.
                System V Release 4 from Rick Ellis and others.
                OSF/1 from Steve Campbell.
                DG/UX from Ben Mesander of the USGS and Bryan Curnutt
                        of Stoner Associates.
                Motorola SysV88 from Kevin Johnson of Motorola.
                Solaris 2.3 from Casper H.S. Dik of the University
                        of Amsterdam and John Caruso of University
                        of Maryland.
                FreeBSD from Ollivier Robert.
                NetBSD from Adam Glass.
                TitanOS from Kate Hedstrom of Rutgers University.
                Irix from Bryan Curnutt.
                Dynix from Jim Davis of the University of Arizona.
                RISC/os.
                Linux from John Kennedy of California State University
                        at Chico.
                Solaris 2.x from Tony Boner of the U.S. Air Force.
                NEXTSTEP 3.x from Vince DeMarco.
                HP-UX from various people.  NOTA BENE:  the location
                        of the config file has moved to /usr/lib
                        to match the HP-UX version of sendmail.
        CONFIG: Don't do any recipient rewriting on relay mailer;
                since this is intended only for internal use, the
                usual RFC 821/822/1123 rules can be relaxed.  The
                main point of this is to avoid munging (ugh) UUCP
                addresses when relaying internally.
        CONFIG: fix typo in mailer/uucp.m4 that mutilates list:;
                syntax addresses delivered via UUCP.  Solution
                provided by Peter Wemm.
        CONFIG: fix thumb-fumble in default UUCP relaying in ruleset
                zero; it caused double @ signs in addresses.  From
                Irving Reid of the University of Toronto.
        CONFIG: Portability fixes for SCO Unix 3.2 with TCP/IP 1.2.1
                from Markku Toijala of ICL Personal Systems Oy.
        CONFIG: Add trailing "." on pseudo-domains for consistency;
                this fixes a problem (noted by Al Whaley of Sunnyside)
                that made it hard to recognize your own pseudodomain
                names.
        CONFIG: catch "@host" syntax errors (i.e., null local-parts)
                rather than letting them get "local configuration
                error"s.  Problem noted by John Gardiner Myers.
        CONFIG: add uucp-uudom mailer variant, based on code posted
                by Spider Boardman <spider@Orb.Nashua.NH.US>; this
                has uucp-dom semantics but old UUCP syntax.  This
                also permits "uucp-old" as an alias for "uucp" and
                "uucp-new" as a synonym for "suucp" for consistency.
        CONFIG: add POP mailer support (from Kimmo Suominen
                <kim@grendel.lut.fi>).
        CONFIG: drop CSNET_RELAY support -- CSNET is long gone.
        CONFIG: fix bug caused with domain literal addresses (e.g.,
                ``[128.32.131.12]'') when FEATURE(allmasquerade)
                was set; it would get an additional @masquerade.host
                added to the address.  Problem noted by Peter Wan
                of Georgia Tech.
        CONFIG: make sure that the local UUCP name is in $=w.  From
                Jim Murray of Stratus.
        CONFIG: changes to UUCP rewriting to simulate IDA-style "V"
                mailer flag.  Briefly, if you are sending to host
                "foo", then it rewrites "foo!...!baz" to "...!baz",
                "foo!baz" remains "foo!baz", and anything else has
                the local name prepended.
        CONFIG: portability fixes for HP-UX.
        DOC: several minor problems fixed in the Install & Op Guide.
        MAKEMAP: fix core dump problem on lines that are too long or
                which lack newline.  From Mark Delany.
        MAILSTATS: print sums of columns (total messages & kbytes
                in and out of the system).  From Tom Ferrin of UC
                San Francisco Computer Graphics Lab.
        SIGNIFICANT USER- OR SYSAD-VISIBLE CHANGES:
                On HP-UX, /etc/sendmail.cf has been moved to
                        /usr/lib/sendmail.cf to match HP sendmail.
                Permissions have been tightened up on world-writable
                        :include: files and accounts that have shells
                        that are not listed in /etc/shells.  This may
                        cause some .forward files that have worked
                        before to start failing.
                SIGUSR1 dumps some state to the log.
        NEW FILES:
                src/Makefile.DGUX
                src/Makefile.Dynix
                src/Makefile.FreeBSD
                src/Makefile.Mach386
                src/Makefile.NetBSD
                src/Makefile.RISCos
                src/Makefile.SCO
                src/Makefile.SVR4
                src/Makefile.Titan
                cf/mailer/pop.m4
                cf/ostype/bsdi1.0.m4
                cf/ostype/dgux.m4
                cf/ostype/dynix3.2.m4
                cf/ostype/sco3.2.m4
                makemap/Makefile.dist
                praliases/Makefile.dist

8.6.4/8.6.4     1993/10/31
        Repair core-dump problem (write to read-only memory segment)
                if you fall back to the return-to-Postmaster case in
                savemail.  Problem reported by Richard Liu.
        Immediately diagnose bogus sender addresses in SMTP.  This
                makes quite certain that crackers can't use this
                class of attack.
        Reliability Fix:  check return value from fclose() and fsync()
                in a few critical places.
        Minor problem in initsys() that reversed a condition for
                redirecting the output channel on queue runs.  It's
                not clear this code even does anything.  From Eric
                Wassenaar of the Dutch National Institute for Nuclear
                and High-Energy Physics.
        Fix some problems that caused queue runs to do "too much work",
                such as double-reading the Errors-To: header.  From
                Eric Wassenaar.
        Error messages on writing the temporary file (including the
                data file) were getting suppressed in SMTP -- this
                fix causes them to be properly reported.  From Eric
                Wassenaar.
        Some changes to support AF_UNIX sockets -- this will only
                really become relevant in the next release, but some
                people need it for local patches.  From Michael
                Corrigan of UC San Diego.
        Use dynamically allocated memory (instead of static buffers)
                for macros defined in initsys() and settime(); since
                these can have different values depending on which
                envelope they are in.  From Eric Wassenaar.
        Improve logging to show ctladdr on to= logging; this tells you
                what uid/gid processes ran as.
        Fix a problem that caused error messages to be discarded if
                the sender address was unparseable for some reason;
                this was supposed to fall back to the "return to
                postmaster" case.
        Improve aliaswait backoff algorithm.
        Portability patches for Linux (8.6.3 required another header
                file) (from Karl London) and SCO UNIX.
        CONFIG: patch prog mailer to not strip host name off of envelope
                addresses (so that it matches local again).  From
                Christopher Davis.
        CONFIG: change uucp-dom mailer so that "<>" translates to $n;
                this prevents uux from seeing lines with null names like
                ``From   Sat Oct 30 14:55:31 1993''.  From Motonori
                Nakamura of Kyoto University.
        CONFIG: handle <list:;> syntax correctly.  This isn't legal, but
                it shouldn't fail miserably.  From Motonori Nakamura.

8.6.2/8.6.2     1993/10/15
        Put a "successful delivery" message in the transcript for
                addresses that get return-receipts.
        Put a prominent "this is only a warning" message in warning
                messages -- some people don't read carefully enough
                and end up sending the message several times.
        Include reason for temporary failure in the "warning" return
                message.  Currently, it just says "cannot send for
                four hours".
        Fix the "Original message received" time generated for
                returntosender messages.  It was previously listed as
                the current time.  Bug reported by Eric Hagberg of
                Cornell University Medical College.
        If there is an error when writing the body of a message,
                don't send the trailing dot and wait for a response
                in sender SMTP, as this could cause the connection to
                hang up under some bizarre circumstances.  From Eric
                Wassenaar.
        Fix some server SMTP synchronization problems caused when
                connections fail during message collection.  From
                Eric Wassenaar.
        Fix a problem that can cause srvrsmtp to reject mail if the
                name server is down -- it accepts the RCPT but rejects
                the DATA command.  Problem reported by Jim Murray of
                Stratus.
        Fix a problem that can cause core dumps if the config file
                incorrectly resolves to a null hostname.  Reported by
                Allan Johannesen of WPI.
        Non-root use of -C flag, dangerous -f flags, and use of -oQ
                by non-root users were not put into
                X-Authentication-Warning:s as intended because the
                config file hadn't set the PrivacyOptions yet.  Fix
                from Sven-Ove Westberg of the University of Lulea.
        Under very odd circumstances, the alias file rebuild code
                could get confused as to whether a database was
                open or not.
        Check "vendor code" on the end of V lines -- this is
                intended to provide a hook for vendor-specific
                configuration syntax.  (This is a "new feature",
                but I've made an exception to my rule in a belief
                that this is a highly exceptional case.)
        Portability fixes for DG/UX (from Douglas Anderson of NCSC),
                SCO Unix (from Murray Kucherawy), A/UX, and OSF/1
                (from Jon Forrest of UC Berkeley)
        CONFIG: fix ``mailer:host'' form of UUCP relay naming.

8.6.1/8.6       1993/10/08
        Portability fixes for A/UX and Encore UMAX V.
        Fix error message handling -- if you had a name server down
                causing an error during parsing, that message was never
                propagated to the queue file.

8.6/8.6         1993/10/05
        Configuration cleanup: make it easier to undo IDENTPROTO in
                conf.h (other systems have the same bug).
        If HASGETDTABLESIZE and _SC_OPEN_MAX are both defined, assume
                getdtablesize() instead of sysconf(); a disturbingly
                large number of systems defined _SC_OPEN_MAX in the
                header files but don't have the syscall.
        Another patch to really truly ignore MX records in getcanonname
                if trymx == FALSE.
        Fix problem that caused the "250 IAA25499 Message accepted for
                delivery" message to be omitted if there was an error
                in the header of the message (e.g., a bad Errors-To:
                line).  Pointed out by Michael Corrigan of UCSD.
        Announce name of host we are chatting when we get errors; this
                is an IDA-ism suggested by Christophe Wolfhugel.
        Portability fixes for Alpha OSF/1 (from Anthony Baxter of the
                Australian Artificial Intelligence Institute), SCO Unix
                (from Murray Kucherawy of Hookup Communication Corp.),
                NeXT (from Vince DeMarco and myself), Linux (from
                Karl London <karl@borg.demon.co.uk>), BSDI (from
                Christophe Wolfhugel, and SVR4 on Dell (from Kimmo
                Suominen), AUX 3.0 on Macintosh, and ANSI C compilers.
        Some changes to get around gcc optimizer bugs.  From Takahiro
                Kanbe.
        Fix error recovery in queueup if another tf file of the same
                name already exists.  Problem stumbled over by Bill
                Wisner of The Well.
        Output YP_MASTER_NAME and YP_LAST_MODIFIED without null bytes.
                Problem noted by Keith McMillan of Ameritech Services.
        Deal with group permissions properly when opening .forward and
                :include: files.  This relaxes the 8.1C restrictions
                slightly more.  This includes proper setting of groups
                when reading :include: files, allowing you to read some
                files that you should be able to read but have previously
                been denied unless you owned them or they had "other"
                read permission.
        Make certain that $j is in $=w (after the .cf is read) so that
                if the user is forced to override some silly system,
                MX suppression will still work.
        Fix a couple of efficiency problems where newstr was double-
                calling expensive routines.  In at least one case, it
                wasn't guaranteed that they would always return the
                same result.  Problem noted by Christophe Wolfhugel.
        Fix null pointer dereference in putoutmsg -- only on an error
                condition from a non-SMTP mailer.  From Motonori
                Nakamura.
        Macro expand "C" line class definitions before scanning so that
                "CX $Z" works.
        Fix problem that caused error message to be sent while still
                trying to send the original message if the connection
                is closed during a DATA command after getting an error
                on an RCPT command (pretty obscure).  Problem reported
                by John Myers of CMU.
        Fix reply to NOOP to be 250 instead of 200 -- this is a long
                term bug.
        Fix a nasty bug causing core dumps when returning the "warning:
                cannot deliver for N hours -- will keep trying" message;
                it only occurred if you had PostmasterCopy set and
                only on some architectures.  Although sendmail would
                keep trying, it would send error messages on each
                queue interval.  This is an important fix.
        Allow u and g options to take user and group names respectively.
        Don't do a chdir into the queue directory in -bt mode to make
                ruleset testing a bit easier.
        Don't allow users to turn off logging (using -oL) on the command
                line -- command line can only raise, not lower, logging
                level.
        Set $u to the original recipient on the SMTP transaction or on
                the command line.  This is only done if there is exactly
                one recipient.  Technically, this does not meet the
                specs, because it does not guarantee a domain on the
                address.
        Fix a problem that dumped error messages on bad addresses if
                you used the -t flag.  Problem noted by Josh Smith of
                Harvey Mudd College.
        Given an address such as ``<foo> <bar>'', auto-quote the first
                ``<foo>'' part, giving ``"<foo>" <bar>''.  This is to
                avoid the problem of people who use angle brackets in
                their full name information.
        Fix a null pointer dereference if you set option "l", have
                an Errors-To: header in the message, and have Errors-To:
                defined in the config file H lines.  From J.R. Oldroyd.
        Put YPCOMPAT on #ifdef NIS instead -- it's one less thing to get
                wrong when compiling.  Suggested by Rick McCarty of TI.
        Fix a problem that could pass negative SIZE parameter if the
                df file got lost; this would cause servers to always
                give a temporary failure, making the problem even worse.
                Problem noted by Allan Johannesen of WPI.
        Add "ident" timeout (one of the "r" option selectors) for IDENT
                protocol timeouts (30s default).  Requested by Murray
                Kucherawy of HookUp Communication Corp. to handle bogus
                PC TCP/IP implementations.
        Change $w default definition to be just the first component of
                the domain name on config level 5.  The $j macro defaults
                to the FQDN; $m remains as before.  This lets well-behaved
                config files use any of the short, long, or subdomain
                names.
        Add makesendmail script in src to try to automate multi-architecture
                builds.  I know, this is sub-optimal, but it is still
                helpful.
        Fix very obscure race condition that can cause a queue run to
                get a queue file for an already completed job.  This
                problem has existed for years.  Problem noted by the
                long suffering Allan Johannesen of WPI.
        Fix a problem that caused the raw sender name to be passed to
                udbsender instead of the canonified name -- this caused
                it to sometimes miss records that it should have found.
        Relax check of name on HELO packet so that a program using -bs
                that claims to be itself works properly.
        Restore rewriting of $: part of address through 2, R, 4 in
                buildaddr -- this requires passing a lot of flags to get
                it right.  Unlike old versions, this ONLY rewrites
                recipient addresses, not sender addresses.
        Fix a bug that caused core dumps in config files that cannot
                resolve /file/name style addresses.  Fix from Jonathan
                Kamens of OpenVision Technologies.
        Fix problem with fcntl locking that can cause error returns to
                be lost if the lock is lost; this required fully
                queueing everything, dropping the envelope (so errors
                would get returned), and then re-reading the queue from
                scratch.
        Fix a problem that caused aliases that redefine an otherwise
                true address to still send to the original address
                if and only if the alias failed in certain bizarre
                ways (e.g, if they pointed at a list:; syntax address).
                Problem pointed out by Jonathan Kamens.
        Remove support for frozen configuration files.  They caused
                more trouble than it was worth.
        Fix problem that can cause error messages to get ignored when
                using both -odb and -t flags.  Problem noted by Rob
                McNicholas at U.C. Berkeley.
        Include all "normal" variations on hostname in $=w.  For example,
                if the host name is vangogh.cs.berkeley.edu, $=w will
                contain vangogh, vangogh.cs, and vangogh.cs.berkeley.edu.
        Add "restrictqrun" privacy flag -- without this, anyone can run
                the queue.
        Reset SmtpPhase global on initial connection creation so that
                messages don't come out with stale information.
        Pass an "ext" argument to lockfile so that error/log messages
                will properly reflect the true filename being locked.
        Put all [...] address forms into $=w -- this eliminates the need
                for MAXIPADDR in conf.h.  Suggested by John Gardiner
                Myers of CMU.
        Fix a bug that can cause qf files to be left around even after
                an SMTP RSET command.  Problem and fix from Michael
                Corrigan.
        Don't send a PostmasterCopy to errors when the Precedence: is
                negative.  Error reports still go to the envelope
                sender address.
        Add LA_SHORT for load averages.
        Lock sendmail.st file when posting statistics.
        Add "SendBufSize" and "RcvBufSize" suboptions to "O" option to
                set the size of the TCP send and receive buffers; if you
                run over a slow slip line you may need to set these down
                (although it would be better to fix the SLIP implementation
                so that it's not necessary to recompile every program
                that does bulk data transfer).
        Allow null defaults on $( ... $) lookups.  Problem reported by
                Amir Plivatsky.
        Diagnose crufty S and V config lines.  This resulted from an
                observation that some people were using the SITE macro
                without the SITECONFIG macro first, which was causing
                bogus config files that were not caught.
        Fix makemap -f flag to turn off case folding (it was turning it
                on instead).  THIS IS A USER VISIBLE CHANGE!!!
        Fix a problem that caused multiple error messages to be sent if
                you used "sendmail -t -oem -odb", your system uses fcntl
                locking, and one of the recipient addresses is unknown.
        Reset uid earlier in include() so that recursive .forwards or
                :include:s don't use the wrong uid.
        If file descriptor 0, 1, or 2 was closed when sendmail was
                called, the code to recover the descriptor was broken.
                This sometimes (only sometimes) caused problems with the
                alias file.  Fix from Motonori Nakamura.
        Fix a problem that caused aliaswait to go into infinite recursion
                if the @:@ metasymbol wasn't found in the alias file.
        Improve error message on newaliases if database files cannot be
                opened or if running with no database format defined.
        Do a better estimation of the size of error messages when NoReturn
                is set.  Problem noted by P{r (Pell) Emanuelsson.
        Fix a problem causing the "c" option (don't connect to expensive
                mailers) to be ignored in SMTP.  Problem noted and the
                solution suggested by Robert Elz of The University of
                Melbourne.
        Improve connection caching algorithm by passing "[host]" to
                hostsignature, which strips the square brackets and
                returns the real name.  This allows mailertable entries
                to match regular entries.
        Re-enable Return-Receipt-To: -- people seem to want this stupid
                feature, even if it doesn't work right.
        Catch and log attempts to try the "wiz" command in server SMTP.
                This also ups the log level from LOG_NOTICE to LOG_CRIT.
        Be more generous at assigning $z to the home directory -- do this
                for programs that are specified through a .forward file.
                Fix from Andrew Chang of Sun Microsystems.
        Always save a fatal error message in preference to a non-fatal
                error message so that the "subject" line of return
                messages is the best possible.
        CONFIG: reduce the number of quotes needed to quote configuration
                parameters with commas: two quotes should work now, e.g.,
                define(ALIAS_FILE, ``/etc/aliases,/etc/aliases.local'').
        CONFIG: class $=Z is a set of UUCP hosts that use uucp-dom
                connections (domain-ized UUCP).
        CONFIG: fix bug in default maps (-o must be before database file
                name).  Pointed out by Christophe Wolfhugel.
        CONFIG: add FEATURE(nodns) to state that we are not relying on
                DNS.  This would presumably be used in UUCP islands.
        CONFIG: add OSTYPE(nextstep) and OSTYPE(linux).
        CONFIG: log $u in Received: line.  This is in technical violation
                of the standards, since it doesn't guarantee a domain
                on the address.
        CONFIG: don't assume "m" in local mailer flags -- this means that
                if you redefine LOCAL_MAILER_FLAGS you will have to include
                the "m" flag should you want it.  Apparently some Solaris 2.2
                installations can't handle multiple local recipients.
                Problem noted by Josh Smith.
        CONFIG: add confDOMAIN_NAME to set $j (if undefined, $j defaults).
        CONFIG: change default version level from 4 to 5.
        CONFIG: add FEATURE(nullclient) to create a config file that
                forwards all mail to a hub without ever looking at the
                addresses in any detail.
        CONFIG: properly strip mailer: information off of relays when
                used to change .BITNET form into %-hack form.
        CONFIG: fix a problem that caused infinite loops if presented
                with an address such as "!foo".
        CONFIG: check for self literal (e.g., [128.32.131.12]) even if
                the reverse "PTR" mapping is broken.  There's a better
                way to do this, but the change is fairly major and I
                want to hold it for another release.  Problem noted by
                Bret Marquis.

8.5/8.5         1993/07/23
        Serious bug: if you used a command line recipient that was unknown
                sendmail would not send a return message (it was treating
                everything as though it had an SMTP-style client that
                would do the return itself).  Problem noted by Josh Smith.
        Change "trymx" option in getcanonname() to ignore all MX data,
                even during a T_ANY query.  This actually didn't break
                anything, because the only time you called getcanonname
                with !trymx was if you already knew there were no MX
                records, but it is somewhat cleaner.  From Motonori
                Nakamura.
        Don't call getcanonname from getmxrr if you already know there
                are no DNS records matching the name.
        Fix a problem causing error messages to always include "The
                original message was received ... from localhost".
                The correct original host information is now included.
        Previous change to cf/sh/makeinfo.sh doesn't port to Ultrix (their
                version of "test" doesn't have the -x flag).  Change it
                to use -f instead.  From John Myers.
        CONFIG: 8.4 mistakenly set the default SMTP-style mailer to
                esmtp -- it should be smtp.
        CONFIG: send all relayed mail using confRELAY_MAILER (defaults
                to "relay" (a variant of "smtp") if MAILER(smtp) is used,
                else "suucp" if MAILER(uucp) is used, else "unknown");
                this cleans up the configs somewhat.  This fixes a serious
                problem that caused route-addrs to get mistaken as relays,
                pointed out by John Myers.  WARNING: this also causes
                the default on SMART_HOST to change from "suucp" to
                "relay" if you have MAILER(smtp) specified.

8.4/8.4         1993/07/22
        Add option `w'.  If you receive a message that comes to you because
                you are the best (lowest preference) target of an MX, and
                you haven't explicitly recognized the source MX host in
                your .cf file, this option will cause you to try the target
                host directly (as if there were no MX for it at all).  If
                `w' is not set, this case is a configuration error.
                Beware: if `w' is set, senders may get bogus errors like
                "message timed out" or "host unknown" for problems that
                are really configuration errors.  This option is
                disrecommended, provided only for compatibility with
                UIUC sendmail.
        Fix a problem that caused the incoming socket to be left open
                when sendmail forks after the DATA command.  This caused
                calling systems to wait in FIN_WAIT_2 state until the
                entire list was processed and the child closed -- a
                potentially prodigious amount of time.  Problem noted
                by Neil Rickert.
        Fix problem (created in 6.64) that caused mail sent to multiple
                addresses, one of which was a bad address, to completely
                suppress the sending of the message.  This changes
                handling of EF_FATALERRS somewhat, and adds an
                EF_GLOBALERRS flag.  This also fixes a potential problem
                with duplicate error messages if there is a syntax error
                in the header of a message that isn't noticed until late
                in processing.  Original problem pointed out by Josh Smith
                of Harvey Mudd College.  This release includes quite a bit
                of dickering with error handling (see below).
        Back out SMTP transaction if MAIL gets nested 501 error.  This
                will only hurt already-broken software and should help
                humans.
        Fix a problem that broke aliases when neither NDBM nor NEWDB were
                compiled in.  It would never read the alias file.
        Repair unbalanced `)' and `>' (the "open" versions are already
                repaired).
        Logging of "done" in dropenvelope() was incorrect: it would
                log this even when the queue file still existed.  Change
                this to only log "done" (at log level 11) when the
                queue file is actually removed.  From John Myers.
        Log "lost connection" in server SMTP at log level 20 if there
                is no pending transaction.  Some senders just close the
                connection rather than sending QUIT.
        Fix a bug causing getmxrr to add a dot to the end of unqualified
                domains that do not have MX records -- this would cause
                the subsequent host name lookup to fail.  The problem
                only occurred if you had FEATURE(nocanonify) set.
                Problem noted by Rick McCarty of Texas Instruments.
        Fix invocation of setvbuf when passed a -X flag -- I had
                unwittingly used an ANSI C extension, and this caused
                core dumps on some machines.
        Diagnose self-destructive alias loops on RCPT as well as EXPN.
                Previously it just gave an empty send queue, which
                then gave either "Need RCPT (recipient)" at the DATA
                (confusing, since you had given an RCPT command which
                returned 250) or just dropped the email, depending on
                whether you were running VERBose mode.  Now it usually
                diagnoses this case as "aliasing/forwarding loop broken".
                Unfortunately, it still doesn't adequately diagnose
                some true error conditions.
        Add internal concept of "warning messages" using 6xx codes.
                These are not reported only to Postmaster.  Unbalanced
                parens, brackets, and quotes are printed as 653 codes.
                They are always mapped to 5xx codes before use in SMTP.
        Clean up error messages to tell both the actual address that
                failed and the alias they arose from.  This makes it
                somewhat easier to diagnose problems.  Difficulty noted
                by Motonori Nakamura.
        Fix a problem that inappropriately added a ctladdr to addresses
                that shouldn't have had one during a queue run.  This
                caused error messages to be handled differently during
                a queue run than a direct run.
        Don't print the qf name and line number if you get errors during
                the direct run of the queue from srvrsmtp -- this was
                just extra stuff for users to crawl through.
        Put command line flags on second line of pid file so you can
                auto-restart the daemon with all appropriate arguments.
                Use "kill `head -1 /etc/sendmail.pid`" to stop the
                daemon, and "eval `tail -1 /etc/sendmail.pid`" to
                restart it.
        Remove the ``setuid(getuid())'' in main -- this caused the
                IDENT daemon to screw up.  This required that I change
                HASSETEUID to HASSETREUID and complicate the mode
                changing somewhat because both Ultrix and SunOS seem
                to have a bug causing seteuid() to set the saved uid
                as well as the effective.  The program test/t_setreuid.c
                will test to see if your implementation of setreuid(2)
                is appropriately functional.
        The FallBackMX (option V) handling failed to properly identify
                fallback to yourself -- most of the code was there,
                but it wasn't being enabled.  Problem noted by Murray
                Kucherawy of the University of Waterloo.
        Change :include: open timeout from ETIMEDOUT to an internal
                code EOPENTIMEOUT; this avoids adding "during SmtpPhase
                with CurHostName" in error messages, which can be
                confusing.  Reported by Jonathan Kamens of OpenVision
                Technologies.
        Back out setpgrp (setpgid on POSIX systems) call to reset the
                process group id.  The original fix was to get around
                some problems with recalcitrant MUAs, but it breaks
                any call from a shell that creates a process group id
                different from the process id.  I could try to fix
                this by diddling the tty owner (using tcsetpgrp or
                equivalent) but this is too likely to break other
                things.
        Portability changes:
                Support -M as equivalent to -oM on Ultrix -- apparently
                        DECnet calls sendmail with -MrDECnet -Ms<HOST> -bs
                        instead of using standard flags.  Oh joy.  This
                        behavior reported by Jon Giltner of University
                        of Colorado.
                SGI IRIX  -- this includes several changes that should
                        help other strict ANSI compilers.
                SCO Unix -- from Murray Kucherawy of HookUp Communication
                        Corporation.
                Solaris running the Sun C compiler (which despite the
                        documentation apparently doesn't define
                        __STDC__ by default).
                ConvexOS from Eric Schnoebelen of Convex.
                Sony NEWS workstations and Omron LUNA workstations from
                        Motonori Nakamura.
        CONFIG: add confTRY_NULL_MX_LIST to set option `w'.
        CONFIG: delete `C' and `e' from default SMTP mailers flags;
                several people have made a good argument that this
                creates more problems than it solves (although this
                may prove painful in the short run).
        CONFIG: generalize all the relays to accept a "mailer:host"
                format.
        CONFIG: move local processing in ruleset 0 into a new ruleset
                98 (8 on old sendmail).  Domain literal [a.b.c.d]
                addresses are also passed through this ruleset.
        CONFIG: if neither SMART_HOST nor MAILER(smtp) were defined,
                internet-style addresses would "fall off the end" of
                ruleset zero and be interpreted as local -- however,
                the angle brackets confused the recursive call.
                These are now diagnosed as "Unrecognized host name".
        CONFIG: USENET rules weren't included in S0 because of a mistaken
                ifdef(`_MAILER_USENET_') instead of
                ifdef(`_MAILER_usenet_').  Problem found by Rein Tollevik
                of SINTEF RUNIT, Oslo.
        CONFIG: move up LOCAL_RULE_0 processing so that it happens very
                early in ruleset 0; this allows .mc authors to bypass
                things like the "short circuit" code for local addresses.
                Prompted by a comment by Bill Wisner of The Well.
        CONFIG: add confSMTP_MAILER to define the mailer used (smtp or
                esmtp) to send SMTP mail.  This allows you to default
                to esmtp but use a mailertable or other override to
                deal with broken servers.  This logic was pointed out
                to me by Bill Wisner.  Ditto for confLOCAL_MAILER.
        Changes to cf/sh/makeinfo.sh to make it portable to SVR4
                environments.  Ugly as sin.

8.3/8.3         1993/07/13
        Fix setuid problems introduced in 8.2 that caused messages
                like "Cannot create qfXXXXXX: Invalid argument"
                or "Cannot reopen dfXXXXXX: Permission denied".  This
                involved a new compile flag "HASSETEUID" that takes
                the place of the old _POSIX_SAVED_IDS -- it turns out
                that the POSIX interface is broken enough to break
                some systems badly.  This includes some fixes for
                HP-UX.  Also fixes problems where the real uid is
                not reset properly on startup (from Neil Rickert).
        Fix a problem that caused timed out messages to not report the
                addresses that timed out.  Error messages are also more
                "user friendly".
        Drop required bandwidth on connections from 64 bytes/sec to
                16 bytes/sec.
        Further Solaris portability changes -- doesn't require the BSD
                compatibility library.  This also adds a new
                "HASGETDTABLESIZE" compile flag which can be used if
                you want to use getdtablesize(2) instead of sysconf(2).
                These are loosely based on changes from David Meyer at
                University of Oregon.  This now seems to work, at least
                for quick test cases.
        Fix a problem that can cause duplicate error messages to be
                sent if you are in SMTP, you send to multiple addresses,
                and at least one of those addresses is good and points
                to an account that has a .forward file (whew!).
        Fix a problem causing messages to be discarded if checkcompat()
                returned EX_TEMPFAIL (because it didn't properly mark
                the "to" address).  Problem noted by John Myers.
        Fix dfopen to return NULL if the open failed; I was depending
                on fdopen(-1) returning NULL, which isn't the case.  This
                isn't serious, but does result in weird error diagnoses.
                From Michael Corrigan.
        CONFIG: add UUCP_MAX_SIZE M4 macro to set the maximum size of
                messages sent through UUCP-family mailers.  Suggested
                by Bill Wisner of The Well.
        CONFIG: if both MAILER(uucp) and MAILER(smtp) are specified,
                include a "uucp-dom" mailer that uses domain-style
                addressing.  Suggested by Bill Wisner.
        CONFIG: Add LOCAL_SHELL_FLAGS and LOCAL_SHELL_ARGS to match
                LOCAL_MAILER_FLAGS and LOCAL_MAILER_ARGS.  Suggested by
                Christophe Wolfhugel.
        CONFIG: Add OSTYPE(aix3).  From Christophe Wolfhugel.

8.2/8.2         1993/07/11
        Don't drop out on config file parse errors in -bt mode.
        On older configuration files, assume option "l" (use Errors-To
                header) for back compatibility.  NOTE:  this DOES NOT
                imply an endorsement of the Errors-To: header in any way.
        Accept -x flag on AIX-3 as well as OSF/1.  Why, why, why???
        Don't log errors on EHLO -- it isn't a "real" error for an old
                SMTP server to give an error on this command, and
                logging it in the transcript can be confusing.  Fix
                from Bill Wisner.
        IRIX compatibility changes provided by Dan Rich
                <drich@sandman.lerc.nasa.gov>.
        Solaris 2 compatibility changes.  Provided by Bob Cunningham
                <bob@kahala.soest.hawaii.edu>, John Oleynick
                <juo@klinzhai.rutgers.edu>
        Debugging: -d17 was overloaded (hostsignature and usersmtp.c);
                move usersmtp (smtpinit and smtpmailfrom) to -d18 to
                match the other flags in that file.
        Flush transcript before fork in mailfile().  From Eric Wassenaar.
        Save h_errno in mci struct and improve error message display.
                Changes from Eric Wassenaar.
        Open /dev/null for the transcript if the create of the xf file
                failed; this avoids at least one possible null pointer
                reference in very weird cases.  From Eric Wassenaar.
        Clean up statistics gathering; it was over-reporting because of
                forks.  From Eric Wassenaar.
        Fix problem that causes old Return-Path: line to override new
                Return-Path: line (conf.c needs H_FORCE to avoid
                re-using old value).  From Motonori Nakamura.
        Fix broken -m flag in K definition -- even if -m (match only)
                was specified, it would still replace the key with the
                value.  Noted by Rick McCarty of Texas Instruments.
        If the name server timed out over several days, no "timed out"
                message would ever be sent back.  The timeout code
                has been moved from markfailure() to dropenvelope()
                so that all such failures should be diagnosed.  Pointed
                out by Christophe Wolfhugel and others.
        Relax safefile() constraints: directories in an include or
                forward path must be readable by self if the controlling
                user owns the entry, readable by all otherwise (e.g.,
                when reading your .forward file, you have to own and
                have X permission in it; everyone needs X permission in
                the root and directories leading up to your home);
                include files must be readable by anyone, but need not
                be owned by you.
        If _POSIX_SAVED_IDS is defined, setuid to the owner before
                reading a .forward file; this gets around some problems
                on NFS mounts if root permission is not exported and
                the user's home directory isn't x'able.
        Additional NeXT portability enhancements from Axel Zinser.
        Additional HP-UX portability enhancements from Brian Bullen.
        Add a timeout around SMTP message writes; this assumes you can
                get throughput of at least 64 bytes/second.  Note that
                this does not impact the "datafinal" default, which
                is separate; this is just intended to work around
                network clogs that will occur before the final dot
                is sent.  From Eric Wassenaar.
        Change map code to set the "include null" flag adaptively --
                it initially tries both, but if it finds anything
                matching without a null it never tries again with a
                null and vice versa.  If -N is specified, it never
                tries without the null and creates new maps with a
                null byte.  If -O is specified, it never tries with
                the null (for efficiency).  If -N and -O are specified,
                you get -NO (get it?) lookup at all, so this would
                be a bad idea.  If you don't specify either -N or -O,
                it adapts.
        Fix recognition of "same from address" so that MH submissions
                will insert the appropriate full name information;
                this used to work and got broken somewhere along the
                way.
        Some changes to eliminate some unnecessary SYSERRs in the
                log.  For example, if you lost a connection, don't
                bother reporting that fact on the connection you lost.
        Add some "extended debugging" flags to try to track down
                why we get occasional problems with file descriptor
                one being closed when execing a mailer; it seems to
                only happen when there has been another error in the
                same transaction.  This requires XDEBUG, defined
                by default in conf.h.
        Add "-X filename" command line flag, which logs both sides of
                all SMTP transactions.  This is intended ONLY for
                debugging bad implementations of other mailers; start
                it up, send a message from a mailer that is failing,
                and then kill it off and examine the indicated log.
                This output is not intended to be particularly human
                readable.  This also adds the HASSETVBUF compile
                flag, defaulted on if your compiler defines __STDC__.
        CONFIG: change SMART_HOST to override an SMTP mailer.  If you
                have a local net that should get direct connects, you
                will need to use LOCAL_NET_CONFIG to catch these hosts.
                See cf/README for an example.
        CONFIG: add LOCAL_MAILER_ARGS (default: `mail -d $u') to handle
                sites that don't use the -d flag.
        CONFIG: hide recipient addresses as well as sender addresses
                behind $M if FEATURE(allmasquerade) is specified; this
                has been requested by several people, but can break
                local aliases.  For example, if you mail to "localalias"
                this will be rewritten as "localalias@masqueradehost";
                although initial delivery will work, replies will be
                broken.  Use it sparingly.
        CONFIG: add FEATURE(domaintable).  This maps unqualified domains
                to qualified domains in headers.  I believe this is
                largely equivalent to the IDA feature of the same name.
        CONFIG: use $U as UUCP name instead of $k.  This permits you
                to override the "system name" as your UUCP name --
                in particular, to use domain-ized UUCP names.  From
                Bill Wisner of The Well.
        CONFIG: create new mailer "esmtp" that always tries EHLO
                first.  This is currently unused in the config files,
                but could be used in a mailertable entry.

8.1C/8.1B       1993/06/27
        Serious security bug fix: it was possible to read any file on
                the system, regardless of ownership and permissions.
        If a subroutine returns a fully qualified address, return it
                immediately instead of feeding it back into rewriting.
                This fixes a problem with mailertable lookups.
        CONFIG: fix some M4 frotz (concat => CONCAT)

8.1B/8.1A       1993/06/12
        Serious bug fix: pattern matching backup algorithm stepped by
                two tokens in classes instead of one.  Found by Claus
                Assmann at University of Kiel, Germany.

8.1A/8.1A       1993/06/08
        Another mailertable fix....

8.1/8.1         1993/06/07
        4.4BSD freeze.  No semantic changes.