NAME¶
smtpd - Simple Mail Transfer Protocol daemon
SYNOPSIS¶
smtpd [
-dnv] [
-D macro=
value] [
-f
file] [
-P system]
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.
- -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.
- -v
- Produce more verbose output.
- -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
FILES¶
- /etc/mailname
- Alternate server name to use.
- /etc/smtpd.conf
- Default smtpd configuration file.
- /var/run/smtpd.sock
- Ux -domain socket used for communication with smtpctl(8).
SEE ALSO¶
smtpd.conf(5),
mailwrapper(8),
smtpctl(8)
STANDARDS¶
Rs %A J. Klensin %D October 2008 %R RFC 5321 %T Simple Mail Transfer Protocol Re
HISTORY¶
The
smtpd program first appeared in OpenBSD 4.6.