POSTALIAS(1)                                         POSTALIAS(1)


NAME
       postalias - Postfix alias database maintenance

SYNOPSIS
       postalias [-c config_dir] [-i] [-v] [file_type:]file_name
       ...

DESCRIPTION
       The  postalias  command  creates  a  new   Postfix   alias
       database, 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  spec-
       tator programs.

       Options:

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

       -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.

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

       B-w    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.



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POSTALIAS(1)                                         POSTALIAS(1)


              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 out-
       put means no problems were detected. Duplicate entries are
       skipped and are flagged with a warning.

ENVIRONMENT
       MAIL_CONFIG
              Mail configuration database.

       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











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