smtpd(8)
NAME
smtpd --- Simple Mail Transfer Protocol daemon
SYNOPSIS
smtpd [-dhnv] [-D macro=value] [-f file] [-P system] [-T trace]
DESCRIPTION
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 file
Specify an alternative configuration file.
-h Display version and usage.
-n Configtest mode. Only check the configuration file for validity.
-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.
FILES
/etc/mailname Alternate server name to use.
/etc/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.
SEE ALSO
smtpd.conf(5), mailwrapper(8), smtpctl(8)
STANDARDS
J. Klensin, Simple Mail Transfer Protocol, RFC 5321, October 2008.
HISTORY
The smtpd program first appeared in OpenBSD 4.6.
Free and Open Source Software