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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 send-mail sendmail
       mail `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.

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).

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  exam-ples. examples.
       ples.

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

       Available in Postfix version 2.9 and later:

       enable_long_queue_ids (no)
              Enable long, non-repeating, queue IDs (queue file names).

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)