    BOUNCE(8)                                               BOUNCE(8)

    NAME
           bounce - Postfix message bounce or defer daemon

    SYNOPSIS
           bounce [generic Postfix daemon options]

    DESCRIPTION
           The  bounce  daemon  maintains  per-message log files with
           non-delivery status information. Each log  file  is  named
           after  the  queue file that it corresponds to, and is kept
           in a queue subdirectory named after the  service  name  in
           the  master.cf file (either bounce, defer or trace).  This
           program expects to be run from the master(8) process  man-
           ager.

           The bounce daemon processes two types of service requests:

           o      Append a recipient (non-)delivery status record  to
                  a per-message log file.

           o      Enqueue a bounce message, with a copy of a per-mes-
                  sage log file and  of  the  corresponding  message.
                  When  the  bounce message is enqueued successfully,
                  the per-message log file is deleted.

           The software does a best notification effort. A non-deliv-
           ery  notification  is  sent  even when the log file or the
           original message cannot be read.

           Optionally, a bounce (defer,  trace)  client  can  request
           that   the  per-message  log  file  be  deleted  when  the
           requested operation fails.  This is used by  clients  that
           cannot  retry  transactions by themselves, and that depend
           on retry logic in their own client.

    STANDARDS
           RFC 822 (ARPA Internet Text Messages)
           RFC 1894 (Delivery Status Notifications)
           RFC 2045 (Format of Internet Message Bodies)

    DIAGNOSTICS
           Problems and transactions are logged to syslogd(8).

    CONFIGURATION PARAMETERS
           Changes  to  main.cf  are  picked  up  automatically,   as
           bounce(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.

           2bounce_notice_recipient (postmaster)
                  The  recipient of undeliverable mail that cannot be
                  returned to the sender.

           backwards_bounce_logfile_compatibility (yes)
                  Produce additional bounce(8) logfile  records  that
                  can be read by older Postfix versions.

           bounce_notice_recipient (postmaster)
                  The  recipient of postmaster notifications with the
                  message  headers  of  mail  that  Postfix  did  not
                  deliver  and  of  SMTP  conversation transcripts of
                  mail that Postfix did not receive.

           bounce_size_limit (50000)
                  The maximal amount of original message text that is
                  sent in a non-delivery notification.

           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.

           delay_notice_recipient (postmaster)
                  The recipient of postmaster notifications with  the
                  message  headers  of  mail that cannot be delivered
                  within $delay_warning_time time units.

           deliver_lock_attempts (20)
                  The maximal number of attempts to acquire an exclu-
                  sive lock on a mailbox file or bounce(8) logfile.

           deliver_lock_delay (1s)
                  The  time  between attempts to acquire an exclusive
                  lock on a mailbox file or bounce(8) logfile.

           ipc_timeout (3600s)
                  The time limit for sending or receiving information
                  over an internal communication channel.

           mail_name (Postfix)
                  The mail system name that is displayed in Received:
                  headers,  in  the  SMTP  greeting  banner,  and  in
                  bounced mail.

           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 daemon process terminates.

           notify_classes (resource, software)
                  The list of error classes that are reported to  the
                  postmaster.

           process_id (read-only)
                  The  process ID of a Postfix command or daemon pro-
                  cess.

           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 direc-
                  tory.

           syslog_facility (mail)
                  The syslog facility of Postfix logging.

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

    FILES
           /var/spool/postfix/bounce/* non-delivery records
           /var/spool/postfix/defer/* non-delivery records
           /var/spool/postfix/trace/* delivery status records

    SEE ALSO
           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

                                                            BOUNCE(8)