POSTALIAS(1)						      General Commands Manual						      POSTALIAS(1)

NAME

       postalias - Postfix alias database maintenance

SYNOPSIS

       postalias [-Nfinrvw] [-c config_dir] [-d key] [-q key] [file_type:]file_name ...

DESCRIPTION

       The postalias command creates or queries one or more Postfix alias databases, or updates an existing one. The input and output file formats
       are expected to be compatible with Sendmail version 8, and are expected to be suitable for the use as NIS alias maps.

       While a database update is in progress, signal delivery is postponed, and an exclusive, advisory, lock is placed on the entire database, in
       order to avoid surprises in spectator programs.

       Options:

       -N     Include  the terminating null character that terminates lookup keys and values. By default, Postfix does whatever is the default for
	      the host operating system.

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

       -d key Search the specified maps for key and remove one entry per map.  The exit status is zero when the requested information was found.

	      If a key value of - is specified, the program reads key values from the standard input stream. The exit status is zero when at least
	      one of the requested keys was found.

       -f     Do not fold the lookup key to lower case while creating or querying a map.

       -i     Incremental  mode.  Read	entries  from standard input and do not truncate an existing database. By default, postalias creates a new
	      database from the entries in file_name.

       -n     Don't include the terminating null character that terminates lookup keys and values.  By	default,  Postfix  does  whatever  is  the
	      default for the host operating system.

       -q key Search  the  specified  maps for key and print the first value found on the standard output stream. The exit status is zero when the
	      requested information was found.

	      If a key value of - is specified, the program reads key values from the standard input stream and prints one line of key: value out-
	      put for each key that was found. The exit status is zero when at least one of the requested keys was found.

       -r     When updating a table, do not warn about duplicate entries; silently replace them.

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

       -w     When updating a table, do not warn about duplicate entries; silently ignore them.

       Arguments:

       file_type
	      The type of database to be produced.

	      btree  The output is a btree file, named file_name.db.  This is available only on systems with support for db databases.

	      dbm    The  output consists of two files, named file_name.pag and file_name.dir.	This is available only on systems with support for
		     dbm databases.

	      hash   The output is a hashed file, named file_name.db.  This is available only on systems with support for db databases.

	      When no file_type is specified, the software uses the database type specified via the database_type  configuration  parameter.   The
	      default value for this parameter depends on the host environment.

       file_name
	      The name of the alias database source file when rebuilding a database.

DIAGNOSTICS

       Problems  are logged to the standard error stream. No output means no problems were detected. Duplicate entries are skipped and are flagged
       with a warning.

       postalias terminates with zero exit status in case of success (including successful postmap -q lookup) and terminates  with  non-zero  exit
       status in case of failure.

ENVIRONMENT

       MAIL_CONFIG
	      Directory with Postfix configuration files.

       MAIL_VERBOSE
	      Enable verbose logging for debugging purposes.

CONFIGURATION PARAMETERS

       The  following  main.cf parameters are especially relevant to this program. See the Postfix main.cf file for syntax details and for default
       values.

       database_type
	      Default alias database type. On many UNIX systems, the default type is either dbm or hash.

STANDARDS

       RFC 822 (ARPA Internet Text Messages)

SEE ALSO

       aliases(5) format of alias database input file.
       sendmail(1) mail posting and compatibility interface.

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

																      POSTALIAS(1)