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BOUNCE(8)                                      System Manager's Manual                                      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 program expects to be run from the master(8)
       process manager.

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

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

       ·      Enqueue a delivery status notification message, with a copy of a per-message log file and of the corre‐
              sponding message.  When the delivery status notification message is enqueued successfully, the per-mes‐
              sage log file is deleted.

       The software does a best notification effort. A non-delivery 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 (Internet Message Format)
       RFC 3462 (Delivery Status Notifications)
       RFC 3464 (Delivery Status Notifications)
       RFC 3834 (Auto-Submitted: message header)
       RFC 5322 (Internet Message Format)

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)
       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 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  terminat‐
              ing 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)
              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

       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA



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