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<html> <head> </head> <body> <pre>



POSTALIAS(1)                                         POSTALIAS(1)


<b>NAME</b>
       postalias - Postfix alias database maintenance

<b>SYNOPSIS</b>
       <b>postalias</b> [<b>-Ninvw</b>] [<b>-c</b> <i>config_dir</i>] [<b>-q</b> <i>key</i>]
       [<i>file_type</i>:]<i>file_name</i> ...

<b>DESCRIPTION</b>
       The <b>postalias</b> 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:

       <b>-N</b>     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.

       <b>-c</b> <i>config_dir</i>
              Read the <b>main.cf</b> configuration file  in  the  named
              directory.

       <b>-i</b>     Incremental  mode. Read entries from standard input
              and  do  not  truncate  an  existing  database.  By
              default,  <b>postalias</b> creates a new database from the
              entries in <b>file</b><i>_</i><b>name</b>.

       <b>-n</b>     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.

       <b>-q</b> <i>key</i> Search  the  specified  maps  for <i>key</i> 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.

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

       <b>-w</b>     Do  not  warn  about  duplicate  entries;  silently
              ignore them.

       Arguments:




                                                                1





POSTALIAS(1)                                         POSTALIAS(1)


       <i>file_type</i>
              The type of database to be produced.

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

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

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

              When no <i>file_type</i> is specified, the  software  uses
              the  database  type specified via the <b>database</b><i>_</i><b>type</b>
              configuration parameter.   The  default  value  for
              this parameter depends on the host environment.

       <i>file_name</i>
              The  name  of  the  alias database source file when
              rebuilding a database.

<b>DIAGNOSTICS</b>
       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.

<b>ENVIRONMENT</b>
       <b>MAIL</b><i>_</i><b>CONFIG</b>
              Directory with Postfix configuration files.

       <b>MAIL</b><i>_</i><b>VERBOSE</b>
              Enable verbose logging for debugging purposes.

<b>CONFIGURATION</b> <b>PARAMETERS</b>
       The following <b>main.cf</b> parameters are  especially  relevant
       to  this  program. See the Postfix <b>main.cf</b> file for syntax
       details and for default values.

       <b>database</b><i>_</i><b>type</b>
              Default alias database type. On many UNIX  systems,
              the default type is either <b>dbm</b> or <b>hash</b>.

<b>STANDARDS</b>
       RFC 822 (ARPA Internet Text Messages)

<b>SEE</b> <b>ALSO</b>
       <a href="aliases.5.html">aliases(5)</a> format of alias database input file.
       <a href="sendmail.1.html">sendmail(1)</a> mail posting and compatibility interface.





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POSTALIAS(1)                                         POSTALIAS(1)


<b>LICENSE</b>
       The  Secure  Mailer  license must be distributed with this
       software.

<b>AUTHOR(S)</b>
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA
















































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