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    Command:

    postconf

    
    
    

    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:
                  "").
    
                  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
                  DATABASE_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)
    
                  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
    
    
    

    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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