ERROR(8) System Manager's Manual ERROR(8)
error - Postfix error mail delivery agent
error [generic Postfix daemon options]
The Postfix error 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. This program expects to be run from the mas-
ter(8) process manager.
The error 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
Delivery status reports are sent to the bounce(8), defer(8) or trace(8)
daemon as appropriate.
The error mailer is not security-sensitive. It does not talk to the
network, and can be run chrooted at fixed low privilege.
Problems and transactions are logged to syslogd(8).
Depending on the setting of the notify_classes parameter, the postmas-
ter is notified of bounces and of other trouble.
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.
The recipient of undeliverable mail that cannot be returned to
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.
config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf con-
How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
The sender address of postmaster notifications that are gener-
ated by the mail system.
The time limit for sending or receiving information over an
internal communication channel.
The maximum amount of time that an idle Postfix daemon process
waits for the next service request before exiting.
The maximal number of connection requests before a Postfix dae-
mon process terminates.
notify_classes (resource, software)
The list of error classes that are reported to the postmaster.
The process ID of a Postfix command or daemon process.
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.
The syslog facility of Postfix logging.
The mail system name that is prepended to the process name in
syslog records, so that "smtpd" becomes, for example, "post-
qmgr(8), queue manager
bounce(8), delivery status reports
postconf(5), configuration parameters
master(8), process manager
syslogd(8), system logging
The Secure Mailer license must be distributed with this software.
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA