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       postconf [-dhmlnv] [-c config_dir] [parameter ...]

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


       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.


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

       -d     Print default parameter settings instead of  actual

       -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 compat­
                     ible library.

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

                     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.
              Postfix lookup tables are specified  as  type:name,
              where  type  is  one of the types listed below. The
                     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 Reg­
                     ular   Expressions.   The   file  format  is
                     described in pcre_table(5).

              proxy (read-only)
                     A lookup table that is implemented  via  the
                     Postfix  proxymap(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  reg­

              static (read-only)
                     A table that  always  returns  its  name  as
                     lookup  result.  For  example, static:foobar
                     always returns the string foobar  as  lookup

              unix (read-only)
                     A  limited way to query the UNIX authentica­
                     tion  database.  The  following  tables  are

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

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

              Directory with Postfix configuration files.


       The Secure Mailer license must be  distributed  with  this


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

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