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 sta-
       tus 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 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-delivery notifica-
       tion 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 (Internet Message Format)
       RFC 3462 (Delivery Status Notifications)
       RFC 3464 (Delivery Status Notifications)
       RFC 3834 (Auto-Submitted: message header)
       RFC 5322 (Internet Message Format)
       RFC 6531 (Internationalized SMTP)
       RFC 6532 (Internationalized Message Format)
       RFC 6533 (Internationalized Delivery Status Notifications)

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 head-
              ers of mail that Postfix did not deliver and of  SMTP  conversa-
              tion 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 message  templates.

       config_directory (see 'postconf -d' output)
              The  default  location of the Postfix main.cf and master.cf con-
              figuration 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 head-
              ers of mail that cannot be delivered within  $delay_warning_time
              time units.

       deliver_lock_attempts(20)
              The maximal number of attempts to acquire an exclusive 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  subject   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 terminating 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 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 3.0 and later:

       smtputf8_autodetect_classes (sendmail, verify)
              Detect  that  a message requires SMTPUTF8 support for the speci-
              fied mail origin classes.

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

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

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