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38 .Nd DragonFly Mail Agent
52 is a small Mail Transport Agent (MTA), designed for home and office use.
53 It accepts mails from locally installed Mail User Agents (MUA) and
54 delivers the mails either locally or to a remote destination.
55 Remote delivery includes several features like TLS/SSL support and SMTP
59 is not intended as a replacement for real, big MTAs like
65 does not listen on port 25 for incoming connections.
67 The options are as follows:
68 .Bl -tag -width indent
71 acts as a compatibility option for sendmail.
73 .Bl -tag -width indent
75 List all mails currently stored in the mail queue.
77 Queue the mail, but do not attempt to deliver it.
80 config file setting below.
87 Do not run in the background.
90 Set sender address (envelope-from) to
92 This overrides the value of the
94 environment variable, but is overridden by the
98 Ignore dots alone on lines by themselves in incoming messages.
99 This should be set if you are reading data from a file.
101 Set the identifier used in syslog messages to the supplied
103 This is a compatibility option for sendmail.
105 This is a compatibility option for sendmail.
106 .It Fl o Ns Ar option
111 All other options are ignored.
112 .It Fl q Ns Op Ar arg
113 Process saved messages in the queue.
114 The argument is optional and ignored.
119 Obtain recipient addresses from the message header.
129 header will be removed independent of whether
135 can be configured with two config files:
144 These two files are stored per default in
147 Every file contains parameters of the form
149 Lines containing boolean values are set to
151 if the line is commented and to
153 if the line is uncommented.
154 Empty lines or lines beginning with a
157 Parameter names and their values are case sensitive.
160 SMTP authentication can be configured in
162 Each line has the format
163 .Dq Li user|smarthost:password .
165 Most of the behaviour of
171 (string, default=empty)
173 If you want to send outgoing mails via a smarthost, set this variable to
174 your smarthosts address.
176 (numeric, default=25)
178 Use this port to deliver remote emails.
179 Only useful together with the
183 will deliver all mails to this port, regardless of whether a smarthost is set
186 (string, default=/etc/aliases)
188 Path to the local aliases file.
189 Just stick with the default.
190 The aliases file is of the format
191 .Dl nam: dest1 dest2 ...
192 In this case, mails to
194 will instead be delivered to
198 which in turn could be entries in
202 can be used to create a catch-all alias, which gets used if no other
203 matching alias is found.
204 Use the catch-all alias only if you do not want any local mail to be
207 (string, default=/var/spool/dma)
212 Just stick with the default.
214 (string, default=not set)
219 .It Ic SECURETRANSFER Xo
220 (boolean, default=commented)
222 Uncomment if you want TLS/SSL secured transfer.
224 (boolean, default=commented)
226 Uncomment if you want to use STARTTLS.
227 Only useful together with
229 .It Ic FINGERPRINT Xo
230 (string, default=empty)
232 Pin the server certificate by specifying its SHA256 fingerprint.
233 Only makes sense if you use a smarthost.
234 .It Ic OPPORTUNISTIC_TLS Xo
235 (boolean, default=commented)
237 Uncomment if you want to allow the STARTTLS negotiation to fail.
240 is used without a smarthost, delivering remote messages directly to
241 the outside mail exchangers; in opportunistic TLS mode, the connection will
242 be encrypted if the remote server supports STARTTLS, but an unencrypted
243 delivery will still be made if the negotiation fails.
244 Only useful together with
249 (string, default=empty)
251 Path to your SSL certificate file.
253 (boolean, default=commented)
255 Uncomment this entry and change it to
257 to use plain text SMTP login over an insecure connection.
258 You have to rename this variable manually to prevent that you send your
259 password accidentally over an insecure connection.
261 (boolean, default=commented)
263 Uncomment if you want that
266 You have to flush your mail queue manually with the
269 This option is handy if you are behind a dialup line.
271 (boolean, default=commented)
273 Uncomment if you want the bounce message to include the complete original
274 message, not just the headers.
276 (string, default=empty)
278 The internet hostname
280 uses to identify the host.
281 If not set or empty, the result of
286 is an absolute path to a file, the first line of this file will be used
289 (string, default=empty)
291 Masquerade the envelope-from addresses with this address/hostname.
292 Use this setting if mails are not accepted by destination mail servers
293 because your sender domain is invalid.
294 This setting overrides the
298 environment variable.
304 sign, the string is interpreted as a host name.
311 will send all mails as
315 will send all mails as
317 .Ql Va username @percolator .
320 (boolean, default=commented)
322 Bypass aliases and local delivery, and instead forward all mails to
330 .Ss Environment variables
333 can be influenced by some environment variables.
337 Used to set the sender address (envelope-from).
338 Use a plain address, in the form of
339 .Li user@example.com .
340 This value will be overridden when the
342 config file setting or the
352 .%T "Simple Mail Transfer Protocol"
357 .%T "SMTP Service Extension for Authentication"
362 .%T "SMTP Service Extension for Secure SMTP over TLS"
368 utility first appeared in
374 .An Matthias Schmidt Aq Mt matthias@dragonflybsd.org
376 .An Simon Schubert Aq Mt 2@0x2c.org .