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# error - Unix, Linux Command

# 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 trouble.

# 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.

Tag | Description
--- | ---
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 directory.
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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