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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=utf-8">
<link rel='stylesheet' type='text/css' href='postfix-doc.css'>
<title> Postfix manual - postconf(1) </title>
</head> <body> <pre>
POSTCONF(1) 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>-dfhHnopqvx</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>-foqvx</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>-fhHoqvx</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>-fhHoqvx</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 TLS features:</b>
<b>postconf -T</b> <i>mode</i> [<b>-v</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</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). The command can also change <a href="postconf.5.html"><b>main.cf</b></a>
configuration parameter values, or display other configuration informa-
tion about the Postfix mail system.
Options:
<b>-a</b> List the available SASL plug-in types for the Postfix SMTP
server. The plug-in type is selected with the <b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a></b>
configuration parameter 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 plug-in types for the Postfix SMTP
client. The 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 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, expanding $<b>name</b> expres-
sions with actual values as described in <a href="bounce.5.html"><b>bounce</b>(5)</a>.
To override the <b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a></b> parameter setting, specify
a template file name at the end of the "<b>postconf -b</b>" command
line. Specify an empty file name to display built-in templates
(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.
This feature is available with Postfix 2.9 and later.
<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 specified 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 specified 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, as it is assumed whenever a value is specified (empty or
non-empty).
<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 "<i>service/type/field=value</i>", one
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>-H</b> Show parameter or attribute names without the " = <i>value</i>" that
normally follows the name.
This feature is available with Postfix 3.1 and later.
<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.
This feature is available with Postfix 2.2 and later.
<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>.
This feature is available with Postfix 2.2 and later.
<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
environment variable name; the table name is ignored.
Originally implemented for testing, someone 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.
This feature is available with Postfix 2.9 and later.
<b>hash</b> An indexed file type based on hashing. Available on sys-
tems with support for Berkeley DB databases.
<b>inline</b> (read-only)
A non-shared, in-memory lookup table. Example: "<b><a href="DATABASE_README.html#types">inline</a>:{</b>
<i>key</i><b>=</b><i>value</i><b>, {</b> <i>key</i> <b>=</b> <i>text with whitespace or comma</i> <b>}}</b>".
Key-value pairs are separated by whitespace or comma;
with a key-value pair inside "<b>{}</b>", whitespace is ignored
after the opening "<b>{</b>", around the "<b>=</b>" between key and
value, and before the closing "<b>}</b>". Inline tables elimi-
nate the need to create a database file for just a few
fixed elements. See also the <i><a href="DATABASE_README.html#types">static</a>:</i> map type.
This feature is available with Postfix 3.0 and later.
<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>.
This feature is available with Postfix 2.11 and later.
<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>.
This feature is available with Postfix 2.9 and later.
<b>mongodb</b>
MongoDB database client. This is described in <a href="mongodb_table.5.html"><b>mongodb_ta-</b></a>
<a href="mongodb_table.5.html"><b>ble</b>(5)</a>.
This feature is available with Postfix 3.9 and later.
<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>.
This feature is available with Postfix 2.1 and later.
<b>pipemap</b> (read-only)
A lookup table that constructs a pipeline of tables.
Example: "<b><a href="DATABASE_README.html#types">pipemap</a>:{</b><i>type</i><b>_</b><i>1:name</i><b>_</b><i>1, ..., type</i><b>_</b><i>n:name</i><b>_</b><i>n</i><b>}</b>".
Each "<a href="DATABASE_README.html#types">pipemap</a>:" query is given to the first table. Each
lookup result becomes the query for the next table in the
pipeline, and the last table produces the final result.
When any table lookup produces no result, the pipeline
produces no result. The first and last characters of the
"<a href="DATABASE_README.html#types">pipemap</a>:" table name must be "<b>{</b>" and "<b>}</b>". Within these,
individual maps are separated with comma or whitespace.
This feature is available with Postfix 3.0 and later.
<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>.
This feature is available with Postfix 2.0 and later.
<b>randmap</b> (read-only)
An in-memory table that performs random selection. Exam-
ple: "<b><a href="DATABASE_README.html#types">randmap</a>:{</b><i>result</i><b>_</b><i>1, ..., result</i><b>_</b><i>n</i><b>}</b>". Each table
query returns a random choice from the specified results.
The first and last characters of the "<a href="DATABASE_README.html#types">randmap</a>:" table
name must be "<b>{</b>" and "<b>}</b>". Within these, individual
results are separated with comma or whitespace. To give a
specific result more weight, specify it multiple times.
This feature is available with Postfix 3.0 and later.
<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.
This feature is available with Postfix 2.2 and later.
<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>.
This feature is available with Postfix 2.10 and later.
<b>sqlite</b> (read-only)
SQLite database. This is described in <a href="sqlite_table.5.html"><b>sqlite_table</b>(5)</a>.
This feature is available with Postfix 2.8 and later.
<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. Specify "<b><a href="DATABASE_README.html#types">static</a>:{</b> <i>text with white-</i>
<i>space</i> <b>}</b>" when the result contains whitespace; this form
ignores whitespace after the opening "<b>{</b>" and before the
closing "<b>}</b>". See also the <i><a href="DATABASE_README.html#types">inline</a>:</i> map.
The form "<b><a href="DATABASE_README.html#types">static</a>:{</b><i>text</i><b>}</b> is available with Postfix 3.0 and
later.
<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.
This feature is available with Postfix 2.8 and later.
<b>unionmap</b> (read-only)
A table that sends each query to multiple lookup tables
and that concatenates all found results, separated by
comma. The table name syntax is the same as for <b>pipemap</b>.
This feature is available with Postfix 3.0 and later.
<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). To show settings that dif-
fer from built-in defaults only, use the following bash syntax:
LANG=C comm -23 <(postconf -n) <(postconf -d)
Replace "-23" with "-12" to show settings that duplicate
built-in defaults.
<b>-o</b> <i>name=value</i>
Override <a href="postconf.5.html"><b>main.cf</b></a> parameter settings. This lets you see the
effect changing a parameter would have when it is used in other
configuration parameters, e.g.:
postconf -x -o stress=yes
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.
This feature is available with Postfix 2.11 and later.
<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 "<i>service/type/parame-</i>
<i>ter=value</i>", one 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>-q</b> Do not log warnings for deprecated or unused parameters.
This feature is available with Postfix 3.9 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
$<b>name</b> expressions.
To override the <b><a href="postconf.5.html#bounce_template_file">bounce_template_file</a></b> parameter setting, specify
a template file name at the end of the "<b>postconf -t</b>" command
line. Specify an empty file name to display built-in templates
(in shell language: "").
This feature is available with Postfix 2.3 and later.
<b>-T</b> <i>mode</i>
If Postfix is compiled without TLS support, the <b>-T</b> option pro-
duces no output. Otherwise, if an invalid <i>mode</i> is specified,
the <b>-T</b> option reports an error and exits with a non-zero status
code. The valid modes are:
<b>compile-version</b>
Output the OpenSSL version that Postfix was compiled with
(i.e. the OpenSSL version in a header file). The output
format is the same as with the command "<b>openssl version</b>".
<b>run-version</b>
Output the OpenSSL version that Postfix is linked with at
runtime (i.e. the OpenSSL version in a shared library).
<b>public-key-algorithms</b>
Output the lower-case names of the supported public-key
algorithms, one per-line.
This feature is available with Postfix 3.1 and later.
<b>-v</b> Enable verbose logging for debugging purposes. Multiple <b>-v</b>
options make the software increasingly verbose.
<b>-x</b> Expand <i>$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 specified with "<i>service/type/parameter</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 2.10 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
Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA
POSTCONF(1)
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