SHOWQ(8postfix)

📦 version 3.8.6, in debian bookworm, ubuntu jammy, ubuntu noble

💖 SHOWQ 💖 (the 8postfix manual, bestie edition)

okay so we're doing showq today and honestly? she's a whole vibe. let's get into it.

✨ NAME ✨

showq — list the Postfix mail queue 🎀

🦋 SYNOPSIS 🦋

showq [generic Postfix daemon options]

🌸 DESCRIPTION 🌸

The showq(8) daemon reports the Postfix mail queue status. The output is meant to be formatted by the postqueue(1) command, because it emulates the Sendmail mailq command. like, it's doing a little cosplay. iconic of her honestly 💅

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. so when everything else is giving absolutely nothing, showq still shows up. main character energy fr fr 👑

🔒 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. 😭

ngl that last part is the important bit — local untrusted users can reach that port, so DoS is a real possibility. not scary-scary, but not nothing either.

📏 STANDARDS 📏

None. The showq(8) daemon does not interact with the outside world. she's an introvert. she stays home. 🏠✨

🩺 DIAGNOSTICS 🩺

Problems and transactions are logged to syslogd(8) or postlogd(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 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.

📁 FILES 📁

/var/spool/postfix, queue directories

👀 SEE ALSO 👀

📜 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

Wietse Venema Google, Inc. 111 8th Avenue New York, NY 10011, USA

and that's the whole page bestie 💖 this was the SHOWQ(8postfix) manual — shoutout to the author(s) listed up there and to the license line that has to ride along with it. mwah. go check your mail queue. slay. ✨🎀🦋

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