showq - list the Postfix mail queue
showq [generic Postfix daemon options]
The showq(8) daemon reports the Postfix mail queue status. The output is
meant to be formatted by the postqueue(1) command, as it emulates the Sendmail
`mailq' command.
The showq(8) daemon can also be run in stand-alone mode by
the superuser. This mode of operation is used to emulate the `mailq' command
while the Postfix mail system is down.
The showq(8) daemon can run in a chroot jail at fixed low privilege, and
takes no input from the client. Its service port is accessible to local
untrusted users, so the service can be susceptible to denial of service
attacks.
None. The showq(8) daemon does not interact with the outside world.
Problems and transactions are logged to syslogd(8) or postlogd(8).
Changes to main.cf are picked up automatically as showq(8)
processes run for only a limited amount of time. Use the command
"postfix reload" to speed up a change.
The text below provides only a parameter summary. See
postconf(5) for more details including examples.
- config_directory (see 'postconf -d' output)
- The default location of the Postfix main.cf and master.cf configuration
files.
- daemon_timeout (18000s)
- How much time a Postfix daemon process may take to handle a request before
it is terminated by a built-in watchdog timer.
- duplicate_filter_limit (1000)
- The maximal number of addresses remembered by the address duplicate filter
for aliases(5) or virtual(5) alias expansion, or for
showq(8) queue displays.
- empty_address_recipient (MAILER-DAEMON)
- The recipient of mail addressed to the null address.
- ipc_timeout (3600s)
- The time limit for sending or receiving information over an internal
communication channel.
- max_idle (100s)
- The maximum amount of time that an idle Postfix daemon process waits for
an incoming connection before terminating voluntarily.
- max_use (100)
- The maximal number of incoming connections that a Postfix daemon process
will service before terminating voluntarily.
- process_id (read-only)
- The process ID of a Postfix command or daemon process.
- process_name (read-only)
- The process name of a Postfix command or daemon process.
- queue_directory (see 'postconf -d' output)
- The location of the Postfix top-level queue directory.
- syslog_facility (mail)
- The syslog facility of Postfix logging.
- syslog_name (see 'postconf -d' output)
- A prefix that is prepended to the process name in syslog records, so that,
for example, "smtpd" becomes "prefix/smtpd".
Available in Postfix version 2.9 and later:
- enable_long_queue_ids (no)
- Enable long, non-repeating, queue IDs (queue file names).
Available in Postfix 3.3 and later:
- service_name (read-only)
- The master.cf service name of a Postfix daemon process.
/var/spool/postfix, queue directories
pickup(8), local mail pickup service
cleanup(8), canonicalize and enqueue mail
qmgr(8), queue manager
postconf(5), configuration parameters
master(8), process manager
postlogd(8), Postfix logging
syslogd(8), system logging
The Secure Mailer license must be distributed with this software.
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA