POSTCONF(1)                                                        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  pro-
              tect shell metacharacters and whitespace.

       -h     Show  parameter values only, not the ``name = '' label that nor-
              mally precedes the value.

       -l     List the names of all supported mailbox locking methods.   Post-
              fix 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 file-
                     name.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.  Postfix
              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.

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

              cidr   A table that  associates  values  with  Classless  Inter-
                     Domain  Routing  (CIDR)  patterns.  This  is described in
                     cidr_table(5).

              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,  some-
                     one 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 ldap_table(5).

              mysql (read-only)
                     Perform   lookups  using  the  MYSQL  protocol.  This  is
                     described in mysql_table(5).

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

              pgsql (read-only)
                     Perform  lookups  using  the PostgreSQL protocol. This is
                     described in pgsql_table(5).

              proxy (read-only)
                     A lookup table that is implemented via the Postfix  prox-
                     ymap(8) service. The table name syntax is type:name.

              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 foo-
                     bar as lookup result.

              tcp (read-only)
                     Perform lookups using  a  simple  request-reply  protocol
                     that  is  described in tcp_table(5).  This feature is not
                     included with Postfix 2.1.

              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  parameter  settings  that  are not left at their built-in
              default value, because they are explicitly specified in main.cf.

       -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.    CONFIGURATION
              PARAMETERS
              The following main.cf parameters are especially relevant to this
              program.

              The text below provides only  a  parameter  summary.  See  post-
              conf(5) for more details including examples.

       config_directory (see 'postconf -d' output)
              The  default  location of the Postfix main.cf and master.cf con-
              figuration files.  FILES /etc/postfix/main.cf, Postfix  configu-
              ration parameters SEE ALSO postconf(5), configuration parameters
              README FILES
              locate this information.
              DATABASE_README, Postfix lookup table overview
              LICENSE
              The  Secure  Mailer  license must be distributed with this soft-
              ware.  AUTHOR(S) Wietse Venema IBM T.J. Watson Research P.O. Box
              704 Yorktown Heights, NY 10598, USA

                                                                   POSTCONF(1)