POSTCONF(1)                                                        POSTCONF(1)



NAME
       postconf - Postfix configuration utility

SYNOPSIS
       Managing main.cf:

       postconf [-dfhnovx] [-c config_dir] [-C class,...] [parameter ...]

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

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

       Managing master.cf:

       postconf [-fMovx] [-c config_dir] [service ...]

       Managing bounce message templates:

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

       Managing other configuration:

       postconf [-aAlmv] [-c config_dir]

DESCRIPTION
       By default, the postconf(1) command displays the values of main.cf con-
       figuration parameters, and warns  about  possible  mis-typed  parameter
       names  (Postfix  2.9 and later).  It can also change main.cf configura-
       tion parameter values, or display 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, replacing $name expres-
              sions with actual values as described in bounce(5).

              To override the built-in templates, specify a template file name
              at  the  end  of the postconf(1) command line, or specify a file
              name in main.cf with the bounce_template_file parameter.

              To force selection of the built-in templates, specify  an  empty
              template  file  name  on  the postconf(1) command line (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.

       -C class,...
              When  displaying main.cf parameters, select only parameters from
              the specified class(es):

              builtin
                     Parameters with built-in names.

              service
                     Parameters with service-defined names (the first field of
                     a master.cf entry plus a Postfix-defined suffix).

              user   Parameters with user-defined names.

              all    All the above classes.

              The default is as if "-C all" is specified.

       -d     Print  main.cf default parameter settings instead of actual set-
              tings.  Specify -df to fold long  lines  for  human  readability
              (Postfix 2.9 and later).

       -e     Edit  the  main.cf configuration file, and update parameter set-
              tings with the "name=value" pairs  on  the  postconf(1)  command
              line.  The  file is copied to a temporary file then renamed into
              place.  Specify quotes to protect special characters and  white-
              space on the postconf(1) command line.

              The -e is no longer needed with Postfix version 2.8 and later.

       -f     Fold long lines when printing main.cf or master.cf configuration
              file entries, for human readability.

              This feature is available with Postfix 2.9 and later.

       -h     Show main.cf parameter values without the "name = "  label  that
              normally 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 program 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.

              fail   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.

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

              internal
                     A non-shared, in-memory hash table. Its content are  lost
                     when a process terminates.

              ldap (read-only)
                     Perform   lookups   using  the  LDAP  protocol.  This  is
                     described in ldap_table(5).

              memcache
                     Perform lookups using  the  memcache  protocol.  This  is
                     described in memcache_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  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.

              socketmap (read-only)
                     Query  a Sendmail-style socketmap server. The name of the
                     table specifies inet:host:port:socketmap-name for a  TCP-
                     based server, or unix:pathname:socketmap-name for a UNIX-
                     domain server. In both cases, socketmap-name is the  name
                     of the socketmap.

              sqlite (read-only)
                     Perform  lookups  from  SQLite  database  files.  This is
                     described in sqlite_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).

              texthash (read-only)
                     Produces  similar results as hash: files, except that you
                     don't need to run the postmap(1) command before  you  can
                     use  the  file, and that it does not detect changes after
                     the file is read.

              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.

       -M     Show master.cf file contents instead of main.cf  file  contents.
              Specify -Mf to fold long lines for human readability.

              If  service ... is specified, only the matching services will be
              output. For example, "postconf -Mf inet" will  output  all  ser-
              vices that listen on the network.

              Specify  zero  or  more arguments, each with a service-type name
              (inet, unix, fifo, or pass) or with a  service-name.service-type
              pair,  where  service-name  is  the  first  field of a master.cf
              entry.

              This feature is available with Postfix 2.9 and later.

       -n     Show only configuration parameters that have explicit name=value
              settings  in  main.cf.  Specify -nf to fold long lines for human
              readability (Postfix 2.9 and later).

       -o name=value
              Override main.cf parameter settings.

              This feature is available with Postfix 2.10 and later.

       -t [template_file]
              Display the templates for text that appears at the beginning  of
              delivery  status  notification (DSN) messages, without expanding
              $name expressions.

              To override the built-in templates, specify a template file name
              at  the  end  of the postconf(1) command line, or specify a file
              name in main.cf with the bounce_template_file parameter.

              To force selection of the built-in templates, specify  an  empty
              template  file  name  on  the postconf(1) command line (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.

       -x     Expand  $name  in  main.cf  or  master.cf  parameter values. The
              expansion is recursive.

              This feature is available with Postfix 2.10 and later.

       -X     Edit the main.cf configuration file, and remove  the  parameters
              named  on the postconf(1) command line.  The file is copied to a
              temporary file then renamed  into  place.   Specify  a  list  of
              parameter  names,  not  "name=value"  pairs.   There is no post-
              conf(1) command to perform the reverse operation.

              This feature is available with Postfix 2.10 and later.

       -#     Edit the main.cf configuration file, and comment out the parame-
              ters named on the postconf(1) command line, so that those param-
              eters revert to their default values.  The file is copied  to  a
              temporary  file  then  renamed  into  place.   Specify a list of
              parameter names, not "name=value"  pairs.   There  is  no  post-
              conf(1) 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
       /etc/postfix/master.cf, Postfix master daemon configuraton

SEE ALSO
       bounce(5), bounce template file format
       master(5), master.cf configuration file syntax
       postconf(5), main.cf configuration file syntax

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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