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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 don't attempt to deliver it.
80 config file setting below.
87 Don't 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 .
166 uses the recipient MTA hostname and finds the first entry in the auth.conf
167 file that matches the smarthost value or the hostname of the recipient
169 It then uses the user and password to authenticate with the smarthost.
171 Note, that the only authentication method supported is CRAM-MD5.
172 The receiving MTA must be configured to accept CRAM-MD5 authentication.
174 Most of the behaviour of
180 (string, default=empty)
182 If you want to send outgoing mails via a smarthost, set this variable to
183 your smarthosts address.
185 (numeric, default=25)
187 Use this port to deliver remote emails.
188 Only useful together with the
192 will deliver all mails to this port, regardless of whether a smarthost is set
195 (string, default=/etc/aliases)
197 Path to the local aliases file.
198 Just stick with the default.
199 The aliases file is of the format
200 .Dl nam: dest1 dest2 ...
201 In this case, mails to
203 will instead be delivered to
207 which in turn could be entries in
211 can be used to create a catch-all alias, which gets used if no other
212 matching alias is found.
213 Use the catch-all alias only if you don't want any local mail to be
216 (string, default=/var/spool/dma)
221 Just stick with the default.
223 (string, default=not set)
228 .It Ic SECURETRANSFER Xo
229 (boolean, default=commented)
231 Uncomment if you want TLS/SSL secured transfer.
233 (boolean, default=commented)
235 Uncomment if you want to use STARTTLS.
236 Only useful together with
238 .It Ic FINGERPRINT Xo
239 Pin the server certificate by specifying its SHA256 fingerprint.
240 Only makes sense if you use a smarthost.
241 .It Ic OPPORTUNISTIC_TLS Xo
242 (boolean, default=commented)
244 Uncomment if you want to allow the STARTTLS negotiation to fail.
247 is used without a smarthost, delivering remote messages directly to
248 the outside mail exchangers; in opportunistic TLS mode, the connection will
249 be encrypted if the remote server supports STARTTLS, but an unencrypted
250 delivery will still be made if the negotiation fails.
251 Only useful together with
256 (string, default=empty)
258 Path to your SSL certificate file.
260 (boolean, default=commented)
262 Uncomment this entry and change it to
264 to use plain text SMTP login over an insecure connection.
265 You have to rename this variable manually to prevent that you send your
266 password accidentally over an insecure connection.
268 (boolean, default=commented)
270 Uncomment if you want that
273 You have to flush your mail queue manually with the
276 This option is handy if you are behind a dialup line.
278 (boolean, default=commented)
280 Uncomment if you want the bounce message to include the complete original
281 message, not just the headers.
283 (string, default=empty)
285 The internet hostname
287 uses to identify the host.
288 If not set or empty, the result of
293 is an absolute path to a file, the first line of this file will be used
296 (string, default=empty)
298 Masquerade the envelope-from addresses with this address/hostname.
299 Use this setting if mails are not accepted by destination mail servers
300 because your sender domain is invalid.
301 This setting overrides the
305 environment variable.
311 sign, the string is interpreted as a host name.
318 will send all mails as
322 will send all mails as
323 .Ql Sm off Va username @percolator .
327 Bypass aliases and local delivery, and instead forward all mails to
335 .Ss Environment variables
338 can be influenced by some environment variables.
342 Used to set the sender address (envelope-from).
343 Use a plain address, in the form of
344 .Li user@example.com .
345 This value will be overridden when the
347 config file setting or the
356 .%T "Simple Mail Transfer Protocol"
361 .%T "SMTP Service Extension for Authentication"
366 .%T "SMTP Service Extension for Secure SMTP over TLS"
372 utility first appeared in
378 .An Matthias Schmidt Aq Mt matthias@dragonflybsd.org
380 .An Simon Schubert Aq Mt 2@0x2c.org .