POSTCONF(1)                                                        POSTCONF(1)



NAME
       postconf - Postfix configuration utility

SYNOPSIS
       postconf [-dhnv] [-c config_dir] [parameter ...]

       postconf [-aAmlv] [-c config_dir]

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

       postconf [-#v] [-c config_dir] [parameter ...]

       postconf [-btv] [-c config_dir] [template_file]

DESCRIPTION
       The  postconf(1)  command  displays  the actual values of configuration
       parameters, changes configuration parameter values, or  displays  other
       configuration information about the Postfix mail system.

       Options:

       -a     List  the available SASL server plug-in types.  The SASL plug-in
              type is selected with the smtpd_sasl_type configuration  parame-
              ter 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  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.

       -A     List the available SASL client plug-in types.  The SASL  plug-in
              type  is selected with the smtp_sasl_type or lmtp_sasl_type con-
              figuration parameters by specifying  one  of  the  names  listed
              below.

              cyrus  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 [template_file]
              Display the message text that appears at the beginning of deliv-
              ery  status  notification (DSN) messages, with $name expressions
              replaced by actual values.  To  override  the  built-in  message
              text, specify a template file at the end of the command line, or
              specify a template file in main.cf with the bounce_template_file
              parameter.  To force selection of the built-in message text tem-
              plates, specify an empty template file name (in shell  language:
              "").

              This feature is available with Postfix 2.3 and later.

       -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 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.  In  Postfix
              configuration  files,  lookup tables are specified as type:name,
              where type is one of the types listed below. The table name syn-
              tax  depends  on the lookup table type as described in the DATA-
              BASE_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 incremen-
                     tal updates.  This is available on systems  with  support
                     for CDB 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
                     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
                     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).

              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 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 the stable Postfix release.

              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.

       -t [template_file]
              Display the templates for  delivery  status  notification  (DSN)
              messages. To override the built-in templates, specify a template
              file at the end of the command line, or specify a template  file
              in  main.cf  with  the bounce_template_file parameter.  To force
              selection of the built-in templates, specify an  empty  template
              file name (in shell language: "").

              This feature is available with Postfix 2.3 and later.

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

       -#     Edit the main.cf configuration file. The file  is  copied  to  a
              temporary file then renamed into place. The parameters specified
              on the command line are commented-out, so that  they  revert  to
              their  default  values.  Specify  a list of parameter names, not
              name=value pairs.  There is no postconf command to  perform  the
              reverse operation.

              This feature is available with Postfix 2.6 and later.

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 pro-
       gram.

       The text below provides only a parameter summary. See  postconf(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.

       bounce_template_file (empty)
              Pathname of a configuration file with bounce message  templates.

FILES
       /etc/postfix/main.cf, Postfix configuration parameters

SEE ALSO
       bounce(5), bounce template file format
       postconf(5), configuration parameters

README FILES
       Use  "postconf readme_directory" or "postconf html_directory" to locate
       this information.
       DATABASE_README, Postfix lookup table overview

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



                                                                   POSTCONF(1)

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