    BOUNCE(8)                                                            BOUNCE(8)

    NAME
           bounce - Postfix delivery status reports

    SYNOPSIS
           bounce [generic Postfix daemon options]

    DESCRIPTION
           The  bounce(8) daemon maintains per-message log files with
           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 pro-
           gram expects to be run from the master(8) process manager.

           The  bounce(8)  daemon  processes  two  types  of  service
           requests:

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

           o      Enqueue  a  delivery  status  notification message,
                  with a copy of a per-message log file  and  of  the
                  corresponding  message.   When  the delivery status
                  notification 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 2045 (Format of Internet Message Bodies)
           RFC 2822 (ARPA Internet Text Messages)
           RFC 3462 (Delivery Status Notifications)
           RFC 3464 (Delivery Status Notifications)
           RFC 3834 (Auto-Submitted: message header)

    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 Postfix versions before 2.0.

           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.

           bounce_template_file (empty)
                  Pathname of a configuration file with  bounce  mes-
                  sage templates.

           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.

           internal_mail_filter_classes (empty)
                  What  categories of Postfix-generated mail are sub-
                  ject  to   before-queue   content   inspection   by
                  non_smtpd_milters, header_checks and body_checks.

           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  an  incoming  connection
                  before terminating voluntarily.

           max_use (100)
                  The  maximal  number of incoming connections that a
                  Postfix daemon process will service  before  termi-
                  nating voluntarily.

           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
                  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  direc-
                  tory.

           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".

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

    SEE ALSO
           bounce(5), bounce message template format
           qmgr(8), queue manager
           postconf(5), configuration parameters
           master(5), generic daemon options
           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)