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NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | HISTORY | COLOPHON |
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SMTPCTL(8) System Manager's Manual SMTPCTL(8)
smtpctl, mailq — control the SMTP daemon
smtpctl, command [argument ...] mailq
The smtpctl, program controls smtpd(8). Commands may be
abbreviated to the minimum unambiguous prefix; for example, sh ro
for show routes.
The mailq command is provided for compatibility with other MTAs
and is simply a shortcut for show queue.
The following commands are available:
discover envelope-id | message-id
Schedule a single envelope, or all envelopes with the
same message ID that were manually moved to the queue.
encrypt [string]
Encrypt the password string to a representation suitable
for user credentials and print it to the standard output.
If string is not provided, cleartext passwords are read
from standard input.
It is advised to avoid providing the password as a
parameter as it will be visible from top(1) and ps(1)
output.
log brief
Disable verbose debug logging.
log verbose
Enable verbose debug logging.
monitor
Display updates of some smtpd(8) internal counters in one
second intervals. Each line reports the increment of all
counters since the last update, except for some counters
which are always absolute values. The first line reports
the current value of each counter. The fields are:
• Current number of active SMTP clients (absolute
value).
• New SMTP clients.
• Disconnected clients.
• Current number of envelopes in the queue (absolute
value).
• Newly enqueued envelopes.
• Dequeued envelopes.
• Successful deliveries.
• Temporary failures.
• Permanent failures.
• Message loops.
• Expired envelopes.
• Envelopes removed by the administrator.
• Generated bounces.
pause envelope envelope-id | message-id | all
Temporarily suspend scheduling for the envelope with the
given ID, envelopes with the given message ID, or all
envelopes.
pause mda
Temporarily stop deliveries to local users.
pause mta
Temporarily stop relaying and deliveries to remote users.
pause smtp
Temporarily stop accepting incoming sessions.
profile subsystem
Enables real-time profiling of subsystem. Supported
subsystems are:
• queue, to profile cost of queue IO
• imsg, to profile cost of event handlers
remove envelope-id | message-id | all
Remove a single envelope, envelopes with the given
message ID, or all envelopes.
resume envelope envelope-id | message-id | all
Resume scheduling for the envelope with the given ID,
envelopes with the given message ID, or all envelopes.
resume mda
Resume deliveries to local users.
resume mta
Resume relaying and deliveries to remote users.
resume route route-id
Resume routing on disabled route route-id.
resume smtp
Resume accepting incoming sessions.
schedule envelope-id | message-id | all
Mark as ready for immediate delivery a single envelope,
envelopes with the given message ID, or all envelopes.
show envelope envelope-id
Display envelope content for the given ID.
show hosts
Display the list of known remote MX hosts. For each of
them, it shows the IP address, the canonical hostname, a
reference count, the number of active connections to this
host, and the elapsed time since the last connection.
show hoststats
Display status of last delivery for domains that have
been active in the last 4 hours. It consists of the
following fields, separated by a "|":
• Domain.
• Unix timestamp of last delivery.
• Status of last delivery.
show message envelope-id
Display message content for the given ID.
show queue
Display information concerning envelopes that are
currently in the queue. Each line of output describes a
single envelope. It consists of the following fields,
separated by a "|":
• Envelope ID.
• Address family of the client which enqueued the mail.
• Type of delivery: one of "mta", "mda" or "bounce".
• Various flags on the envelope.
• Sender address (return path).
• The original recipient address.
• The destination address.
• Time of creation.
• Time of expiration.
• Time of last delivery or relaying attempt.
• Number of delivery or relaying attempts.
• Current runstate: either "pending" or "inflight" if
smtpd(8) is running, or "offline" otherwise.
• Delay in seconds before the next attempt if pending,
or time elapsed if currently running. This field is
blank if smtpd(8) is not running.
• Error string for the last failed delivery or relay
attempt.
show relays
Display the list of currently active relays and
associated connectors. For each relay, it shows a number
of counters and information on its internal state on a
single line. Then comes the list of connectors (source
addresses to connect from for this relay).
show routes
Display status of routes currently known by smtpd(8).
Each line consists of a route number, a source address, a
destination address, a set of flags, the number of
connections on this route, the current penalty level
which determines the amount of time the route is disabled
if an error occurs, and the delay before it gets
reactivated. The following flags are defined:
D The route is currently disabled.
N The route is new. No SMTP session has been
established yet.
Q The route has a timeout registered to lower its
penalty level and possibly reactivate or discard it.
show stats
Displays runtime statistics concerning smtpd(8).
show status
Shows if MTA, MDA and SMTP systems are currently running
or paused.
spf walk
Recursively look up SPF records for the domains read from
stdin. For example:
$ smtpctl spf walk < domains.txt
SPF records may contain macros which cannot be included
in a static list and must be resolved dynamically at
connection time. spf walk cannot provide full results in
these cases.
trace subsystem
Enables real-time tracing of subsystem. Supported
subsystems are:
• imsg
• io
• smtp (incoming sessions)
• filters
• mta (outgoing sessions)
• bounce
• scheduler
• expand (aliases/virtual/forward expansion)
• lookup (user/credentials lookups)
• stat
• rules (matched by incoming sessions)
• mproc
• all
unprofile subsystem
Disables real-time profiling of subsystem.
untrace subsystem
Disables real-time tracing of subsystem.
update table name
Updates the contents of table name, for tables using the
“file” backend.
When smtpd receives a message, it generates a message-id for the
message, and one envelope-id per recipient. The message-id is a
32-bit random identifier that is guaranteed to be unique on the
host system. The envelope-id is a 64-bit unique identifier that
encodes the message-id in the 32 upper bits and a random envelope
identifier in the 32 lower bits.
A command which specifies a message-id applies to all recipients
of a message; a command which specifies an envelope-id applies to
a specific recipient of a message.
/var/run/smtpd.sock Unix-domain socket used for communication
with smtpd(8).
smtpd(8)
The smtpctl, 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 2024-06-14. (At
that time, the date of the most recent commit that was found in
the repository was 2024-06-09.) 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
[email protected]
GNU March 2, 2023 SMTPCTL(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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