DOKK / manpages / debian 12 / postfix / showq.8postfix.en
SHOWQ(8postfix) SHOWQ(8postfix)

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.



  

  
The default location of the Postfix main.cf and master.cf configuration
      files.

  

  
How much time a Postfix daemon process may take to handle a request before
      it is terminated by a built-in watchdog timer.

  

  
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.

  

  
The recipient of mail addressed to the null address.

  

  
The time limit for sending or receiving information over an internal
      communication channel.

  

  
The maximum amount of time that an idle Postfix daemon process waits for
      an incoming connection before terminating voluntarily.

  

  
The maximal number of incoming connections that a Postfix daemon process
      will service before terminating voluntarily.

  

  
The process ID of a Postfix command or daemon process.

  

  
The process name of a Postfix command or daemon process.

  

  
The location of the Postfix top-level queue directory.

  

  
The syslog facility of Postfix logging.

  

  
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, non-repeating, queue IDs (queue file names).




Available in Postfix 3.3 and later:



  

  
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