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POSTCONF(1) General Commands Manual POSTCONF(1)
<b>NAME</b>
postconf - Postfix configuration utility
<b>SYNOPSIS</b>
<b>Managing <a href="postconf.5.html">main.cf</a>:</b>
<b>postconf</b> [<b>-dfhnopvx</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<b>-C</b> <i>class,...</i>] [<i>parameter ...</i>]
<b>postconf</b> [<b>-epv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>parameter</i><b>=</b><i>value ...</i>
<b>postconf -#</b> [<b>-pv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>parameter ...</i>
<b>postconf -X</b> [<b>-pv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>parameter ...</i>
<b>Managing <a href="master.5.html">master.cf</a> service entries:</b>
<b>postconf -M</b> [<b>-fovx</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>service</i>[<b>/</b><i>type</i>] <i>...</i>]
<b>postconf -M</b> [<b>-ev</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type</i><b>=</b><i>value ...</i>
<b>postconf -M#</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type ...</i>
<b>postconf -MX</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type ...</i>
<b>Managing <a href="master.5.html">master.cf</a> service fields:</b>
<b>postconf -F</b> [<b>-fovx</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>service</i>[<b>/</b><i>type</i>[<b>/</b><i>field</i>]] <i>...</i>]
<b>postconf -F</b> [<b>-ev</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type</i><b>/</b><i>field</i><b>=</b><i>value ...</i>
<b>Managing <a href="master.5.html">master.cf</a> service parameters:</b>
<b>postconf -P</b> [<b>-fovx</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>service</i>[<b>/</b><i>type</i>[<b>/</b><i>parameter</i>]] <i>...</i>]
<b>postconf -P</b> [<b>-ev</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type</i><b>/</b><i>parameter</i><b>=</b><i>value ...</i>
<b>postconf -PX</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>service</i><b>/</b><i>type</i><b>/</b><i>parameter ...</i>
<b>Managing bounce message templates:</b>
<b>postconf -b</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>template</i><b>_</b><i>file</i>]
<b>postconf -t</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] [<i>template</i><b>_</b><i>file</i>]
<b>Managing other configuration:</b>
<b>postconf -a</b>|<b>-A</b>|<b>-l</b>|<b>-m</b> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>]
<b>DESCRIPTION</b>
By default, the <a href="postconf.1.html"><b>postconf</b>(1)</a> command displays the values of <a href="postconf.5.html"><b>main.cf</b></a> con-
figuration parameters, and warns about possible mis-typed parameter
names (Postfix 2.9 and later). It can also change <a href="postconf.5.html"><b>main.cf</b></a> configura-
tion parameter values, or display 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 parame-
ter by specifying one of the names listed below.
<b>cyrus</b> This server plug-in is available when Postfix is built
with Cyrus SASL support.
<b>dovecot</b>
This server plug-in uses the Dovecot authentication
server, and is available when Postfix 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> con-
figuration parameters by specifying one of the names listed
below.
<b>cyrus</b> This client plug-in is available when Postfix 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 beginning of deliv-
ery status notification (DSN) messages, replacing $<b>name</b> expres-
sions with actual values as described in <a href="bounce.5.html"><b>bounce</b>(5)</a>.
To override the built-in templates, specify a template file name
at the end of the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line, or specify a file
name in <a href="postconf.5.html"><b>main.cf</b></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 on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line (in shell
language: "").
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>-C</b> <i>class,...</i>
When displaying <a href="postconf.5.html"><b>main.cf</b></a> parameters, select only parameters from
the specified class(es):
<b>builtin</b>
Parameters with built-in names.
<b>service</b>
Parameters with service-defined names (the first field of
a <a href="master.5.html"><b>master.cf</b></a> entry plus a Postfix-defined suffix).
<b>user</b> Parameters with user-defined names.
<b>all</b> All the above classes.
The default is as if "<b>-C all</b>" is specified.
<b>-d</b> Print <a href="postconf.5.html"><b>main.cf</b></a> default parameter settings instead of actual set-
tings. Specify <b>-df</b> to fold long lines for human readability
(Postfix 2.9 and later).
<b>-e</b> Edit the <a href="postconf.5.html"><b>main.cf</b></a> configuration file, and update parameter set-
tings with the "<i>name=value</i>" pairs on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command
line.
With <b>-M</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and replace one
or more service entries with new values as specified with "<i>ser-</i>
<i>vice/type=value</i>" on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
With <b>-F</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and replace one
or more service fields with new values as specied with "<i>ser-</i>
<i>vice/type/field=value</i>" on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line. Cur-
rently, the "command" field contains the command name and com-
mand arguments. this may change in the near future, so that the
"command" field contains only the command name, and a new "argu-
ments" pseudofield contains the command arguments.
With <b>-P</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and add or
update one or more service parameter settings (-o parame-
ter=value settings) with new values as specied with "<i>ser-</i>
<i>vice/type/parameter=value</i>" on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
In all cases the file is copied to a temporary file then renamed
into place. Specify quotes to protect special characters and
whitespace on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
The <b>-e</b> option is no longer needed with Postfix version 2.8 and
later.
<b>-f</b> Fold long lines when printing <a href="postconf.5.html"><b>main.cf</b></a> or <a href="master.5.html"><b>master.cf</b></a> configuration
file entries, for human readability.
This feature is available with Postfix 2.9 and later.
<b>-F</b> Show <a href="master.5.html"><b>master.cf</b></a> per-entry field settings (by default all services
and all fields), formatted as one "<i>service/type/field=value</i>" per
line. Specify <b>-Ff</b> to fold long lines.
Specify one or more "<i>service/type/field</i>" instances on the <a href="postconf.1.html"><b>post-</b></a>
<a href="postconf.1.html"><b>conf</b>(1)</a> command line to limit the output to fields of interest.
Trailing parameter name or service type fields that are omitted
will be handled as "*" wildcard fields.
This feature is available with Postfix 2.11 and later.
<b>-h</b> Show parameter or attribute values without the "<i>name</i> = " label
that normally precedes the value.
<b>-l</b> List the names of all supported mailbox locking methods. Post-
fix 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>file-</i>
<i>name</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 program 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> syn-
tax 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. Available on systems
with support for Berkeley DB databases.
<b>cdb</b> A read-optimized structure with no support for incremen-
tal updates. Available on systems with support for CDB
databases.
<b>cidr</b> A table that associates values with Classless 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. Available on sys-
tems with support for DBM databases.
<b>environ</b>
The UNIX process environment array. The lookup key is the
variable name. Originally implemented for testing, some-
one may find this useful someday.
<b>fail</b> A table that reliably fails all requests. The lookup ta-
ble name is used for logging. This table exists to sim-
plify Postfix error tests.
<b>hash</b> An indexed file type based on hashing. Available on sys-
tems with support for Berkeley DB databases.
<b>internal</b>
A non-shared, in-memory hash table. Its content are lost
when a process terminates.
<b>lmdb</b> OpenLDAP LMDB database (a memory-mapped, persistent
file). Available on systems with support for LMDB data-
bases. This is described in <a href="lmdb_table.5.html"><b>lmdb_table</b>(5)</a>.
<b>ldap</b> (read-only)
LDAP database client. This is described in <a href="ldap_table.5.html"><b>ldap_table</b>(5)</a>.
<b>memcache</b>
Memcache database client. This is described in <a href="memcache_table.5.html"><b>mem-</b></a>
<a href="memcache_table.5.html"><b>cache_table</b>(5)</a>.
<b>mysql</b> (read-only)
MySQL database client. Available on systems with support
for MySQL databases. This is described in <a href="mysql_table.5.html"><b>mysql_ta-</b></a>
<a href="mysql_table.5.html"><b>ble</b>(5)</a>.
<b>pcre</b> (read-only)
A lookup table based on Perl Compatible Regular Expres-
sions. The file format is described in <a href="pcre_table.5.html"><b>pcre_table</b>(5)</a>.
<b>pgsql</b> (read-only)
PostgreSQL database client. This is described in
<a href="pgsql_table.5.html"><b>pgsql_table</b>(5)</a>.
<b>proxy</b> Postfix <a href="proxymap.8.html"><b>proxymap</b>(8)</a> client for shared access to Postfix
databases. 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_table</b>(5)</a>.
<b>sdbm</b> An indexed file type based on hashing. Available on sys-
tems with support for SDBM databases.
<b>socketmap</b> (read-only)
Sendmail-style socketmap client. The table name is
<b>inet</b>:<i>host</i>:<i>port</i>:<i>name</i> for a TCP/IP server, or <b>unix</b>:<i>path-</i>
<i>name</i>:<i>name</i> for a UNIX-domain server. This is described in
<a href="socketmap_table.5.html"><b>socketmap_table</b>(5)</a>.
<b>sqlite</b> (read-only)
SQLite database. This is described in <a href="sqlite_table.5.html"><b>sqlite_table</b>(5)</a>.
<b>static</b> (read-only)
A table that always returns its name as lookup result.
For example, <b><a href="DATABASE_README.html#types">static</a>:foobar</b> always returns the string <b>foo-</b>
<b>bar</b> as lookup result.
<b>tcp</b> (read-only)
TCP/IP client. The protocol is described in <a href="tcp_table.5.html"><b>tcp_table</b>(5)</a>.
<b>texthash</b> (read-only)
Produces similar results as <a href="DATABASE_README.html#types">hash</a>: files, except that you
don't need to run the <a href="postmap.1.html"><b>postmap</b>(1)</a> command before you can
use the file, and that it does not detect changes after
the file is read.
<b>unix</b> (read-only)
A limited view of the UNIX authentication database. The
following tables are implemented:
<b>unix:passwd.byname</b>
The table is the UNIX password database. 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 Postfix was built.
<b>-M</b> Show <a href="master.5.html"><b>master.cf</b></a> file contents instead of <a href="postconf.5.html"><b>main.cf</b></a> file contents.
Specify <b>-Mf</b> to fold long lines for human readability.
Specify zero or more arguments, each with a <i>service-name</i> or <i>ser-</i>
<i>vice-name/service-type</i> pair, where <i>service-name</i> is the first
field of a <a href="master.5.html">master.cf</a> entry and <i>service-type</i> is one of (<b>inet</b>,
<b>unix</b>, <b>fifo</b>, or <b>pass</b>).
If <i>service-name</i> or <i>service-name/service-type</i> is specified, only
the matching <a href="master.5.html">master.cf</a> entries will be output. For example,
"<b>postconf -Mf smtp</b>" will output all services named "smtp", and
"<b>postconf -Mf smtp/inet</b>" will output only the smtp service that
listens on the network. Trailing service type fields that are
omitted will be handled as "*" wildcard fields.
This feature is available with Postfix 2.9 and later. The syntax
was changed from "<i>name.type</i>" to "<i>name/type</i>", and "*" wildcard
support was added with Postfix 2.11.
<b>-n</b> Show only configuration parameters that have explicit <i>name=value</i>
settings in <a href="postconf.5.html"><b>main.cf</b></a>. Specify <b>-nf</b> to fold long lines for human
readability (Postfix 2.9 and later).
<b>-o</b> <i>name=value</i>
Override <a href="postconf.5.html"><b>main.cf</b></a> parameter settings.
This feature is available with Postfix 2.10 and later.
<b>-p</b> Show <a href="postconf.5.html"><b>main.cf</b></a> parameter settings. This is the default.
<b>-P</b> Show <a href="master.5.html"><b>master.cf</b></a> service parameter settings (by default all ser-
vices and all parameters). formatted as one "<i>ser-</i>
<i>vice/type/parameter=value</i>" per line. Specify <b>-Pf</b> to fold long
lines.
Specify one or more "<i>service/type/parameter</i>" instances on the
<a href="postconf.1.html"><b>postconf</b>(1)</a> command line to limit the output to parameters of
interest. Trailing parameter name or service type fields that
are omitted will be handled as "*" wildcard fields.
This feature is available with Postfix 2.11 and later.
<b>-t</b> [<i>template</i><b>_</b><i>file</i>]
Display the templates for text that appears at the beginning of
delivery status notification (DSN) messages, without expanding
$<b>name</b> expressions.
To override the built-in templates, specify a template file name
at the end of the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line, or specify a file
name in <a href="postconf.5.html"><b>main.cf</b></a> with the <b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a></b> parameter.
To force selection of the built-in templates, specify an empty
template file name on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line (in shell
language: "").
This feature is available with Postfix 2.3 and later.
<b>-v</b> Enable verbose logging for debugging purposes. Multiple <b>-v</b>
options make the software increasingly verbose.
<b>-x</b> Expand <i>$name</i> in <a href="postconf.5.html"><b>main.cf</b></a> or <a href="master.5.html"><b>master.cf</b></a> parameter values. The
expansion is recursive.
This feature is available with Postfix 2.10 and later.
<b>-X</b> Edit the <a href="postconf.5.html"><b>main.cf</b></a> configuration file, and remove the parameters
named on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line. Specify a list of param-
eter names, not "<i>name=value</i>" pairs.
With <b>-M</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and remove one
or more service entries as specified with "<i>service/type</i>" on the
<a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
With <b>-P</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and remove one
or more service parameter settings (-o parameter=value settings)
as specied with "<i>service/type/parameter</i>" on the <a href="postconf.1.html"><b>postconf</b>(1)</a> com-
mand line.
In all cases the file is copied to a temporary file then renamed
into place. Specify quotes to protect special characters on the
<a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
There is no <a href="postconf.1.html"><b>postconf</b>(1)</a> command to perform the reverse opera-
tion.
This feature is available with Postfix 2.10 and later. Support
for -M and -P was added with Postfix 2.11.
<b>-#</b> Edit the <a href="postconf.5.html"><b>main.cf</b></a> configuration file, and comment out the parame-
ters named on the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line, so that those param-
eters revert to their default values. Specify a list of parame-
ter names, not "<i>name=value</i>" pairs.
With <b>-M</b>, edit the <a href="master.5.html"><b>master.cf</b></a> configuration file, and comment out
one or more service entries as specified with "<i>service/type</i>" on
the <a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
In all cases the file is copied to a temporary file then renamed
into place. Specify quotes to protect special characters on the
<a href="postconf.1.html"><b>postconf</b>(1)</a> command line.
There is no <a href="postconf.1.html"><b>postconf</b>(1)</a> command to perform the reverse opera-
tion.
This feature is available with Postfix 2.6 and later. Support
for -M was added with Postfix 2.11.
<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 pro-
gram.
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> con-
figuration files.
<b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a> (empty)</b>
Pathname of a configuration file with bounce message templates.
<b>FILES</b>
/etc/postfix/<a href="postconf.5.html">main.cf</a>, Postfix configuration parameters
/etc/postfix/<a href="master.5.html">master.cf</a>, Postfix master daemon configuration
<b>SEE ALSO</b>
<a href="bounce.5.html">bounce(5)</a>, bounce template file format <a href="master.5.html">master(5)</a>, <a href="master.5.html">master.cf</a>
configuration file syntax <a href="postconf.5.html">postconf(5)</a>, <a href="postconf.5.html">main.cf</a> configuration
file syntax
<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)
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