POSTALIAS(1)                                         POSTALIAS(1)


NAME
       postalias - Postfix alias database maintenance

SYNOPSIS
       postalias [-Ninvw] [-c config_dir] [-q key]
       [file_type:]file_name ...

DESCRIPTION
       The postalias command creates or queries one or more Post-
       fix 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  spec-
       tator programs.

       Options:

       -N     Include  the terminating null character that termi-
              nates 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.

       -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 non-zero if the requested infor-
              mation was not found.

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

       -w     Do  not  warn  about  duplicate  entries;  silently
              ignore them.

       Arguments:




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POSTALIAS(1)                                         POSTALIAS(1)


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

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.





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POSTALIAS(1)                                         POSTALIAS(1)


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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