POSTCONF(1)

NAME
postconf - Postfix configuration utility

SYNOPSIS
postconf [-dhmlnv] [-c config_dir] [parameter ...] postconf [-ev] [-c config_dir] [parameter=value ...]

DESCRIPTION
The postconf command prints the actual value of parameter (all known parameters by default) one parameter per line, changes its value, or prints other information about the Postfix mail system. Options:

-c config_dir
    The main.cf configuration file is in the named directory instead of the default configuration directory.

-d  Print default parameter settings instead of actual settings.

-e  Edit the main.cf 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.

-h  Show parameter values only, not the ``name = '' label that normally precedes the value.

-l  List the names of all supported mailbox locking methods. Postfix supports the following methods:

    flock
        A kernel-based advisory locking method for local files only. This locking method is available only on systems with a BSD compatible library.

    fcntl
        A kernel-based advisory locking method for local and remote files.

    dotlock
        An application-level locking method. An application locks a file named filename by creating a file named filename.lock. The application is expected to remove its own lock file, as well as stale lock files that were left behind after abnormal termination.

-m  List the names of all supported lookup table types.

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

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

    ldap (read-only)
        Perform lookups using the LDAP protocol. This is described in an LDAP_README file.

    mysql (read-only)
        Perform lookups using the MYSQL protocol. This is described in a MYSQL_README file.

    pcre (read-only)
        A lookup table based on Perl Compatible Regular Expressions. The file format is described in pcre_table(5).

    regexp (read-only)
        A lookup table based on regular expressions. The file format is described in regexp_table(5).

    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 database. The following tables are implemented:

        unix:passwd.byname
            The table is the UNIX password database. The key is a login name. The result is a password file entry in passwd(5) format.

        unix:group.byname
            The table is the UNIX group database. The key is a group name. The result is a group file entry in group(5) format.

Other table types may exist depending on how Postfix was built.

-n  Print non-default parameter settings only.

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

DIAGNOSTICS
Problems are reported to the standard error stream.

ENVIRONMENT

MAIL_CONFIG
    Directory with Postfix configuration files.

LICENSE
The Secure Mailer license must be distributed with this software.

AUTHOR(S)
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA