POSTQUEUE(1)                                                      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 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.

              Object members have string values  unless  indicated  otherwise.
              Programs  should ignore object members that are not listed here;
              the list of members 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 messages may be missed.

                     The  queue  file  name.  The  name  may  be reused unless
                     "enable_long_queue_ids = true".

                     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  approximately equal to the number of bytes that would
                     be transmitted via SMTP including the <CR><LF> line  end-

              sender The envelope sender address.

                     An array containing zero or more objects with members:

                            One recipient address.

                            If present, the reason for delayed delivery.  Some
                            delayed recipients have no delay reason, for exam-
                            ple, when delivery is in progress or when the sys-
                            tem was stopped before it could record the reason.

              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.

       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 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 file with the
                     alternate_config_directories configuration parameter.

              o      The command is invoked by the super-user.

       The following 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, or
              via the MAIL_CONFIG environment parameter.

       config_directory (see 'postconf -d' output)
              The default location of the Postfix and  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)
              The  mail  system  name that is prepended to the process name in
              syslog records, so that "smtpd"  becomes,  for  example,  "post-

       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

       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

       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