postlog Man page

POSTLOG(1) General Commands Manual POSTLOG(1)


postlog – Postfix-compatible logging utility


postlog [-iv] [-c config_dir] [-p priority] [-t tag] [text…]


The postlog command implements a Postfix-compatible logging inter‐
face for use in, for example, shell scripts.

By default, postlog logs the text given on the command line as one
record. If no text is specified on the command line, postlog reads
from standard input and logs each input line as one record.

Logging is sent to syslogd(8); when the standard error stream is con‐
nected to a terminal, logging is sent there as well.

The following options are implemented:

-c config_dir
Read the configuration file in the named directory
instead of the default configuration directory.

-i Include the process ID in the logging tag.

-p priority (default: info)
Specifies the logging severity: info, warn, error, fatal, or
panic. With Postfix 3.1 and later, the program will pause for 1
second after reporting a fatal or panic condition, just like
other Postfix programs.

-t tag Specifies the logging tag, that is, the identifying name that
appears at the beginning of each logging record. A default tag
is used when none is specified.

-v Enable verbose logging for debugging purposes. Multiple -v
options make the software increasingly verbose.

Directory with the file.



The following parameters are especially relevant to this pro‐

The text below provides only a parameter summary. See postconf(5) for
more details including examples.

config_directory (see ‘postconf -d’ output)
The default location of the Postfix and con‐
figuration files.

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, “post‐


postconf(5), configuration parameters
syslogd(8), syslog daemon

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


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