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Updated: Wednesday, February 10, 2021

postqueue (1)


postqueue - Postfix queue control


To flush the mail queue:

postqueue [-v] [-c config_dir] -f

postqueue [-v] [-c config_dir] -i queue_id

postqueue [-v] [-c config_dir] -s site

To list the mail queue:

postqueue [-v] [-c config_dir] -j

postqueue [-v] [-c config_dir] -p


POSTQUEUE(1)                General Commands Manual               POSTQUEUE(1)

       postqueue - Postfix queue control

   To flush the mail queue:

       postqueue [-v] [-c config_dir] -f

       postqueue [-v] [-c config_dir] -i queue_id

       postqueue [-v] [-c config_dir] -s site

   To list the mail queue:

       postqueue [-v] [-c config_dir] -j

       postqueue [-v] [-c config_dir] -p

       The  postqueue(1)  command  implements  the  Postfix user interface for
       queue management.  It  implements  operations  that  are  traditionally
       available  via  the  sendmail(1) command.  See the postsuper(1) command
       for queue operations that require super-user privileges such as  delet-
       ing a message from the queue or changing the status of a message.

       The following options are recognized:

       -c config_dir
              The main.cf configuration file is in the named directory instead
              of the default configuration directory. See also the MAIL_CONFIG
              environment setting below.

       -f     Flush the queue: attempt to deliver all queued mail.

              This option implements the traditional "sendmail -q" command, by
              contacting the Postfix qmgr(8) daemon.

              Warning: flushing undeliverable mail frequently will  result  in
              poor delivery performance of all other mail.

       -i queue_id
              Schedule  immediate delivery of deferred mail with the specified
              queue ID.

              This option implements the traditional sendmail -qI command,  by
              contacting the flush(8) server.

              This feature is available with Postfix version 2.4 and later.

       -j     Produce a queue listing in JSON format, based on output from the
              showq(8) daemon.  The result is a stream of zero  or  more  JSON
              objects,  one per queue file.  Each object is followed by a new-
              line character to support simple streaming  parsers.  See  "JSON
              OBJECT FORMAT" below for details.

              This feature is available in Postfix 3.1 and later.

       -p     Produce a traditional sendmail-style queue listing.  This option
              implements the traditional  mailq  command,  by  contacting  the
              Postfix showq(8) daemon.

              Each  queue entry shows the queue file ID, message size, arrival
              time, sender, and the recipients that still need  to  be  deliv-
              ered.  If mail could not be delivered upon the last attempt, the
              reason for failure is shown. The queue ID string is followed  by
              an optional status character:

              *      The  message  is in the active queue, i.e. the message is
                     selected for delivery.

              !      The message is in the hold queue, i.e. no further  deliv-
                     ery  attempt  will  be  made  until the mail is taken off

       -s site
              Schedule immediate delivery of all mail that is queued  for  the
              named  site.  A  numerical site must be specified as a valid RFC
              5321  address  literal  enclosed  in  [],  just  like  in  email
              addresses.   The site must be eligible for the "fast flush" ser-
              vice.  See flush(8) for more information about the "fast  flush"

              This  option  implements the traditional "sendmail -qRsite" com-
              mand, by contacting the Postfix flush(8) daemon.

       -v     Enable verbose  logging  for  debugging  purposes.  Multiple  -v
              options  make  the  software increasingly verbose. As of Postfix
              2.3, this option is available for the super-user only.

       Each JSON object represents one queue file; it is emitted as  a  single
       text line followed by a newline character.

       Object members have string values unless indicated otherwise.  Programs
       should ignore object members that are not listed here; the list of mem-
       bers is expected to grow over time.

              The  name  of  the queue where the message was found.  Note that
              the contents of the mail queue may  change  while  it  is  being
              listed;  some  messages may appear more than once, and some mes-
              sages may be missed.

              The queue file name. The queue_id may be reused within a Postfix
              instance unless "enable_long_queue_ids = true" and time is mono-
              tonic.  Even then, the queue_id is not  expected  to  be  unique
              between  different  Postfix  instances.   Management  tools that
              require a unique name  should  combine  the  queue_id  with  the
              myhostname setting of the Postfix instance.

              The number of seconds since the start of the UNIX epoch.

              The  number of bytes in the message header and body. This number
              does not include message envelope information.  It  is  approxi-
              mately  equal  to  the number of bytes that would be transmitted
              via SMTP including the <CR><LF> line endings.

       sender The envelope sender address.

              An array containing zero or more objects with members:

                     One recipient address.

                     If present, the reason  for  delayed  delivery.   Delayed
                     recipients  may  have no delay reason, for example, while
                     delivery is in progress, or after the system was  stopped
                     before it could record the reason.

       This  program  is designed to run with set-group ID privileges, so that
       it can connect to Postfix daemon processes.

       RFC 7159 (JSON notation)

       Problems are logged to syslogd(8) and to the standard error stream.

              Directory with the main.cf file. In order to avoid  exploitation
              of  set-group ID privileges, a non-standard directory is allowed
              only if:

              o      The name is listed in the standard main.cf file with  the
                     alternate_config_directories configuration parameter.

              o      The command is invoked by the super-user.

       The  following  main.cf parameters are especially relevant to this pro-
       gram.  The text below provides only  a  parameter  summary.  See  post-
       conf(5) for more details including examples.

       alternate_config_directories (empty)
              A list of non-default Postfix configuration directories that may
              be specified with "-c config_directory" on the command line  (in
              the case of sendmail(1), with "-C config_directory"), or via the
              MAIL_CONFIG environment parameter.

       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and  master.cf  con-
              figuration files.

       command_directory (see 'postconf -d' output)
              The location of all postfix administrative commands.

       fast_flush_domains ($relay_domains)
              Optional list of destinations that are eligible for per-destina-
              tion logfiles with mail that is queued to those destinations.

       import_environment (see 'postconf -d' output)
              The list of environment parameters that a Postfix  process  will
              import from a non-Postfix parent 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".

       trigger_timeout (10s)
              The time limit for sending a trigger to a  Postfix  daemon  (for
              example, the pickup(8) or qmgr(8) daemon).

       Available in Postfix version 2.2 and later:

       authorized_flush_users (static:anyone)
              List of users who are authorized to flush the queue.

       authorized_mailq_users (static:anyone)
              List of users who are authorized to view the queue.

       /var/spool/postfix, mail queue

       See attributes(7) for descriptions of the following attributes:

       |ATTRIBUTE TYPE |       ATTRIBUTE VALUE        |
       |Availability   | service/network/smtp/postfix |
       |Stability      | Volatile                     |
       qmgr(8), queue manager
       showq(8), list mail queue
       flush(8), fast flush service
       sendmail(1), Sendmail-compatible user interface
       postsuper(1), privileged queue operations

       Use  "postconf readme_directory" or "postconf html_directory" to locate
       this information.
       ETRN_README, Postfix ETRN howto

       The Secure Mailer license must be distributed with this software.

       The postqueue command was introduced with Postfix version 1.1.

       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

       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from  https://archive.mgm51.com/mirrors/postfix-

       Further information about this software can be found on the open source
       community website at http://www.postfix.org.