    ERROR(8)                                                              ERROR(8)

    NAME
           error - Postfix error mail delivery agent

    SYNOPSIS
           error [generic Postfix daemon options]

    DESCRIPTION
           The  Postfix  error(8)  delivery  agent processes delivery
           requests from the queue manager. Each request specifies  a
           queue  file,  a sender address, a domain or host name that
           is treated as the reason for non-delivery,  and  recipient
           information.   The  reason  may  be  prefixed  with an RFC
           3463-compatible detail code.  This program expects  to  be
           run from the master(8) process manager.

           The  error(8) delivery agent bounces all recipients in the
           delivery request  using  the  "next-hop"  domain  or  host
           information  as  the  reason for non-delivery, updates the
           queue file and marks recipients as finished or informs the
           queue  manager  that  delivery  should be tried again at a
           later time.

           Delivery  status  reports  are  sent  to  the   bounce(8),
           defer(8) or trace(8) daemon as appropriate.

    SECURITY
           The error(8) mailer is not security-sensitive. It does not
           talk to the network, and can be run chrooted at fixed  low
           privilege.

    STANDARDS
           RFC 3463 (Enhanced Status Codes)

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

           Depending  on the setting of the notify_classes parameter,
           the postmaster is notified of bounces and of  other  trou-
           ble.

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

           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.

           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_logging_resolution_limit (2)
                  The  maximal  number  of  digits  after the decimal
                  point when logging sub-second delay values.

           double_bounce_sender (double-bounce)
                  The sender address of postmaster notifications that
                  are generated by the mail system.

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

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

    SEE ALSO
           qmgr(8), queue manager
           bounce(8), delivery status reports
           discard(8), Postfix discard delivery agent
           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

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