bounce - Postfix delivery status reports
bounce [generic Postfix daemon options]
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 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
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.
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)
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 message 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 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 specified mail
origin classes.
Available in Postfix 3.3 and later:
- service_name
(read-only)
- The master.cf service name of a Postfix daemon process.
Available in Postfix 3.6 and later:
- enable_threaded_bounces
(no)
- Enable non-delivery, success, and delay notifications that link to the
original message by including a References: and In-Reply-To: header with
the original Message-ID value.
Available in Postfix 3.7 and later:
- The format of the Postfix-generated From: header.
/var/spool/postfix/bounce/* non-delivery records
/var/spool/postfix/defer/* non-delivery records
/var/spool/postfix/trace/* delivery status records
The Secure Mailer license must be distributed with this
software.
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