showq



SHOWQ(8)                                                              SHOWQ(8)




NAME

       showq - list the Postfix mail queue


SYNOPSIS

       showq [generic Postfix daemon options]


DESCRIPTION

       The  showq(8)  daemon reports the Postfix mail queue status.  It is the
       program that emulates the sendmail ‘mailq’ command.

       The showq(8) daemon can also be run in stand-alone mode  by  the  supe-
       ruser.  This  mode  of operation is used to emulate the ‘mailq’ command
       while the Postfix mail system is down.


SECURITY

       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.


STANDARDS

       None. The showq(8) daemon does not interact with the outside world.


DIAGNOSTICS

       Problems and transactions are logged to syslogd(8).


BUGS

       The  showq(8)  daemon  runs  at a fixed low privilege; consequently, it
       cannot extract information from queue files in the maildrop  directory.


CONFIGURATION PARAMETERS

       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  con-
              figuration 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 dupli-
              cate 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 the next service request before exiting.

       max_use (100)
              The maximal number of connection requests before a Postfix  dae-
              mon process terminates.

       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 (postfix)
              The  mail  system  name that is prepended to the process name in
              syslog records, so that "smtpd"  becomes,  for  example,  "post-
              fix/smtpd".


FILES

       /var/spool/postfix, queue directories


SEE ALSO

       pickup(8), local mail pickup service
       cleanup(8), canonicalize and enqueue mail
       qmgr(8), queue manager
       postconf(5), configuration parameters
       master(8), process manager
       syslogd(8), system logging


LICENSE

       The Secure Mailer license must be distributed with this software.


AUTHOR(S)

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA



                                                                      SHOWQ(8)

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