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NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | STANDARDS | HISTORY | COLOPHON |
SMTPD(8) BSD System Manager's Manual SMTPD(8)
smtpd — Simple Mail Transfer Protocol daemon
smtpd [-dFhnv] [-D macro=value] [-f file] [-P system] [-T trace]
smtpd is a Simple Mail Transfer Protocol (SMTP) daemon which can be
used as a machine's primary mail system. smtpd can listen on a network
interface and handle SMTP transactions; it can also be fed messages
through the standard sendmail(8) interface. It can relay messages
through remote mail transfer agents or store them locally using either
the mbox or maildir format. This implementation supports SMTP as
defined by RFC 5321 as well as several extensions. A running smtpd can
be controlled through smtpctl(8).
The options are as follows:
-D macro=value
Define macro to be set to value on the command line. Overrides
the definition of macro in the configuration file.
-d Do not daemonize. If this option is specified, smtpd will run
in the foreground and log to stderr.
-F Do not daemonize. If this option is specified, smtpd will run
in the foreground and log to syslogd(8).
-f file
Specify an alternative configuration file.
-h Display version and usage.
-n Configtest mode. Only check the configuration file for valid‐
ity.
-P system
Pause a specific subsystem at startup. Normal operation can be
resumed using smtpctl(8). This option can be used multiple
times. The accepted values are:
mda Do not schedule local deliveries.
mta Do not schedule remote transfers.
smtp Do not listen on SMTP sockets.
-T trace
Enables real-time tracing at startup. Normal operation can be
resumed using smtpctl(8). This option can be used multiple
times. The accepted values are:
· imsg
· io
· smtp (incoming sessions)
· filters
· transfer (outgoing sessions)
· bounce
· scheduler
· expand (aliases/virtual/forward expansion)
· lookup (user/credentials lookups)
· stat
· rules (matched by incoming sessions)
· mproc
· all
-v Produce more verbose output.
/etc/mail/mailname Alternate server name to use.
/etc/mail/smtpd.conf Default smtpd configuration file.
/var/run/smtpd.sock UNIX-domain socket used for communication with
smtpctl(8).
/var/spool/smtpd/ Spool directories for mail during processing.
~/.forward User email forwarding information.
forward(5), smtpd.conf(5), mailwrapper(8), smtpctl(8)
J. Klensin, Simple Mail Transfer Protocol, RFC 5321, October 2008.
The smtpd program first appeared in OpenBSD 4.6.
This page is part of the OpenSMTPD (a FREE implementation of the
server-side SMTP protocol) project. Information about the project can
be found at https://www.opensmtpd.org/. If you have a bug report for
this manual page, see ⟨https://github.com/OpenSMTPD/OpenSMTPD/issues⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/OpenSMTPD/OpenSMTPD.git⟩ on 2020-08-13. (At that
time, the date of the most recent commit that was found in the reposi‐
tory was 2020-07-27.) If you discover any rendering problems in this
HTML version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or improvements to
the information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
BSD January 3, 2017 BSD