postconf

The postconf command displays the actual values of configuration parameters, changes configuration parameter values, or displays other configuration information about the Postfix mail system.

Documentation

• man 1 'postconf' [EN]
• man 5 'postconf' [EN]

Syntax

postconf [PARAMETER ...] [OPTION[=VALUE] ...]

Parameters

-a

List the available SASL server plug-in types. The SASL plug-in type is selected with the smtpd_sasl_type configuration parameter by specifying one of the names listed below.

cyrus

This server plug-in is available when Postfix is built with Cyrus SASL support.

dovecot

This server plug-in requires the Dovecot authentication server.

-m

List the names of all supported lookup table types. In Postfix configuration files, lookup tables are specified as type:name, where type is one of the types listed below. The table name syntax depends on the lookup table type as described in the DATABASE_README document.

btree

A sorted, balanced tree structure. This is available on systems with support for Berkeley DB databases.

cdb

A read-optimized structure with no support for incremental updates. This is available on systems with support for CDB databases.

cidr

A table that associates values with Classless Inter-Domain Routing (CIDR) patterns.

dbm

An indexed file type based on hashing. This is available on systems with support for DBM databases.

environ

The UNIX process environment array. The lookup key is the variable name. Originally implemented for testing, someone may find this useful someday.

hash

An indexed file type based on hashing. This is available on systems with support for Berkeley DB databases.

ldap (read-only)

Perform lookups using the LDAP protocol.

mysql (read-only)

Perform lookups using the MYSQL protocol.

pcre (read-only)

A lookup table based on Perl Compatible Regular Expressions.

pgsql (read-only)

Perform lookups using the PostgreSQL protocol.

proxy (read-only)

A lookup table that is implemented via the Postfix proxymap service. The table name syntax is type:name.

regexp (read-only)

A lookup table based on regular expressions.

sdbm

An indexed file type based on hashing. This is available on systems with support for SDBM databases.

static (read-only)

A table that always returns its name as lookup result. For example, static:foobar always returns the string foobar as lookup result.

unix (read-only)

A limited way to query the UNIX authentication databases. The following tables are implemented:

unix

passwd.byname

The table is the UNIX password database. The key is a login name.

unix

group.byname

The table is the UNIX group database. The key is a group name.