SMTPD(8) | System Manager's Manual | SMTPD(8) |
NAME
smtpd
— Simple
Mail Transfer Protocol (SMTP) daemon
SYNOPSIS
smtpd |
[-dFhnv ] [-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
- 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 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/smtpd/mailname
- Alternate server name to use.
- /etc/smtpd/smtpd.conf
- Default
smtpd
configuration file. - /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.
SEE ALSO
STANDARDS
J. Klensin, Simple Mail Transfer Protocol, RFC 5321, October 2008.
HISTORY
The smtpd
program first appeared in
OpenBSD 4.6.
March 2, 2023 | Linux 6.10.2-arch1-1 |