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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html> <head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title> Postfix manual - postconf(1) </title>
</head> <body> <pre>
POSTCONF(1) POSTCONF(1)
<b>NAME</b>
postconf - Postfix configuration utility
<b>SYNOPSIS</b>
<b>postconf</b> [<b>-dhnv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>parameter ...</i>]
<b>postconf</b> [<b>-aAmlv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>]
<b>postconf</b> [<b>-ev</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>parameter=value ...</i>]
<b>postconf</b> [<b>-#v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>parameter ...</i>]
<b>postconf</b> [<b>-btv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>template</i><b>_</b><i>file</i>]
<b>DESCRIPTION</b>
The <a href="postconf.1.html"><b>postconf</b>(1)</a> command displays the actual values of con-
figuration parameters, changes configuration parameter
values, or displays other configuration information about
the Postfix mail system.
Options:
<b>-a</b> List the available SASL server plug-in types. The
SASL plug-in type is selected with the
<b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a></b> configuration parameter by specify-
ing one of the names listed below.
<b>cyrus</b> This server plug-in is available when Post-
fix is built with Cyrus SASL support.
<b>dovecot</b>
This server plug-in uses the Dovecot authen-
tication server, and is available when Post-
fix is built with any form of SASL support.
This feature is available with Postfix 2.3 and
later.
<b>-A</b> List the available SASL client plug-in types. The
SASL plug-in type is selected with the
<b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a></b> or <b><a href="postconf.5.html#lmtp_sasl_type">lmtp_sasl_type</a></b> configuration
parameters by specifying one of the names listed
below.
<b>cyrus</b> This client plug-in is available when Post-
fix is built with Cyrus SASL support.
This feature is available with Postfix 2.3 and
later.
<b>-b</b> [<i>template</i><b>_</b><i>file</i>]
Display the message text that appears at the begin-
ning of delivery status notification (DSN) mes-
sages, with $<b>name</b> expressions replaced by actual
values. To override the built-in message text,
specify a template file at the end of the command
line, or specify a template file in <a href="postconf.5.html">main.cf</a> with
the <b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a></b> parameter. To force
selection of the built-in message text templates,
specify an empty template file name (in shell lan-
guage: "").
This feature is available with Postfix 2.3 and
later.
<b>-c</b> <i>config</i><b>_</b><i>dir</i>
The <a href="postconf.5.html"><b>main.cf</b></a> configuration file is in the named
directory instead of the default configuration
directory.
<b>-d</b> Print default parameter settings instead of actual
settings.
<b>-e</b> Edit the <a href="postconf.5.html"><b>main.cf</b></a> configuration file. The file is
copied to a temporary file then renamed into place.
Parameters and values are specified on the command
line. Use quotes in order to protect shell
metacharacters and whitespace.
<b>-h</b> Show parameter values only, not the ``name = ''
label that normally precedes the value.
<b>-l</b> List the names of all supported mailbox locking
methods. Postfix supports the following methods:
<b>flock</b> A kernel-based advisory locking method for
local files only. This locking method is
available on systems with a BSD compatible
library.
<b>fcntl</b> A kernel-based advisory locking method for
local and remote files.
<b>dotlock</b>
An application-level locking method. An
application locks a file named <i>filename</i> by
creating a file named <i>filename</i><b>.lock</b>. The
application is expected to remove its own
lock file, as well as stale lock files that
were left behind after abnormal termination.
<b>-m</b> List the names of all supported lookup table types.
In Postfix configuration files, lookup tables are
specified as <i>type</i><b>:</b><i>name</i>, where <i>type</i> is one of the
types listed below. The table <i>name</i> syntax depends
on the lookup table type as described in the <a href="DATABASE_README.html">DATA</a>-
<a href="DATABASE_README.html">BASE_README</a> document.
<b>btree</b> A sorted, balanced tree structure. This is
available on systems with support for Berke-
ley DB databases.
<b>cdb</b> A read-optimized structure with no support
for incremental updates. This is available
on systems with support for CDB databases.
<b>cidr</b> A table that associates values with Class-
less Inter-Domain Routing (CIDR) patterns.
This is described in <a href="cidr_table.5.html"><b>cidr_table</b>(5)</a>.
<b>dbm</b> An indexed file type based on hashing. This
is available on systems with support for DBM
databases.
<b>environ</b>
The UNIX process environment array. The
lookup key is the variable name. Originally
implemented for testing, someone may find
this useful someday.
<b>hash</b> An indexed file type based on hashing. This
is available on systems with support for
Berkeley DB databases.
<b>internal</b>
A non-shared, in-memory hash table. Its con-
tent are lost when a process terminates.
<b>ldap</b> (read-only)
Perform lookups using the LDAP protocol.
This is described in <a href="ldap_table.5.html"><b>ldap_table</b>(5)</a>.
<b>mysql</b> (read-only)
Perform lookups using the MYSQL protocol.
This is described in <a href="mysql_table.5.html"><b>mysql_table</b>(5)</a>.
<b>pcre</b> (read-only)
A lookup table based on Perl Compatible Reg-
ular Expressions. The file format is
described in <a href="pcre_table.5.html"><b>pcre_table</b>(5)</a>.
<b>pgsql</b> (read-only)
Perform lookups using the PostgreSQL proto-
col. This is described in <a href="pgsql_table.5.html"><b>pgsql_table</b>(5)</a>.
<b>proxy</b> (read-only)
A lookup table that is implemented via the
Postfix <a href="proxymap.8.html"><b>proxymap</b>(8)</a> service. The table name
syntax is <i>type</i><b>:</b><i>name</i>.
<b>regexp</b> (read-only)
A lookup table based on regular expressions.
The file format is described in <a href="regexp_table.5.html"><b>regexp_ta-</b></a>
<a href="regexp_table.5.html"><b>ble</b>(5)</a>.
<b>sdbm</b> An indexed file type based on hashing. This
is available on systems with support for
SDBM databases.
<b>static</b> (read-only)
A table that always returns its name as
lookup result. For example, <b>static:foobar</b>
always returns the string <b>foobar</b> as lookup
result.
<b>tcp</b> (read-only)
Perform lookups using a simple request-reply
protocol that is described in <a href="tcp_table.5.html"><b>tcp_table</b>(5)</a>.
This feature is not included with the stable
Postfix release.
<b>unix</b> (read-only)
A limited way to query the UNIX authentica-
tion database. The following tables are
implemented:
<b>unix:passwd.byname</b>
The table is the UNIX password data-
base. The key is a login name. The
result is a password file entry in
<b>passwd</b>(5) format.
<b>unix:group.byname</b>
The table is the UNIX group database.
The key is a group name. The result
is a group file entry in <b>group</b>(5)
format.
Other table types may exist depending on how Post-
fix was built.
<b>-n</b> Print parameter settings that are not left at their
built-in default value, because they are explicitly
specified in <a href="postconf.5.html">main.cf</a>.
<b>-t</b> [<i>template</i><b>_</b><i>file</i>]
Display the templates for delivery status notifica-
tion (DSN) messages. To override the built-in tem-
plates, specify a template file at the end of the
command line, or specify a template file in <a href="postconf.5.html">main.cf</a>
with the <b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a></b> parameter. To force
selection of the built-in templates, specify an
empty template file name (in shell language: "").
This feature is available with Postfix 2.3 and
later.
<b>-v</b> Enable verbose logging for debugging purposes. Mul-
tiple <b>-v</b> options make the software increasingly
verbose.
<b>-#</b> Edit the <a href="postconf.5.html"><b>main.cf</b></a> configuration file. The file is
copied to a temporary file then renamed into place.
The parameters specified on the command line are
commented-out, so that they revert to their default
values. Specify a list of parameter names, not
name=value pairs. There is no <b>postconf</b> command to
perform the reverse operation.
This feature is available with Postfix 2.6 and
later.
<b>DIAGNOSTICS</b>
Problems are reported to the standard error stream.
<b>ENVIRONMENT</b>
<b>MAIL_CONFIG</b>
Directory with Postfix configuration files.
<b>CONFIGURATION PARAMETERS</b>
The following <a href="postconf.5.html"><b>main.cf</b></a> parameters are especially relevant
to this program.
The text below provides only a parameter summary. See
<a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
<a href="master.5.html">master.cf</a> configuration files.
<b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a> (empty)</b>
Pathname of a configuration file with bounce mes-
sage templates.
<b>FILES</b>
/etc/postfix/<a href="postconf.5.html">main.cf</a>, Postfix configuration parameters
<b>SEE ALSO</b>
<a href="bounce.5.html">bounce(5)</a>, bounce template file format
<a href="postconf.5.html">postconf(5)</a>, configuration parameters
<b>README FILES</b>
<a href="DATABASE_README.html">DATABASE_README</a>, Postfix lookup table overview
<b>LICENSE</b>
The Secure Mailer license must be distributed with this
software.
<b>AUTHOR(S)</b>
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
POSTCONF(1)
</pre> </body> </html>
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