# nisplus_table - Postfix NIS+ client - man(5) - [phpMan]

[_NISPLUS_TABLE_(5)](https://www.chedong.com/phpMan.php/man/NISPLUSTABLE/5/markdown)                         File Formats Manual                        [_NISPLUS_TABLE_(5)](https://www.chedong.com/phpMan.php/man/NISPLUSTABLE/5/markdown)

## NAME
       nisplus_table - Postfix NIS+ client

## SYNOPSIS
       **postmap -q "_**string_**" "nisplus:[_**name_**=%s];_**name.name._**"**

       **postmap -q - "nisplus:[_**name_**=%s];_**name.name._**" <_**inputfile_

## DESCRIPTION
       The  Postfix  mail system uses optional lookup tables.  These tables are usually in **dbm **or **db**
       format.  Alternatively, lookup tables can be specified as NIS+ databases.

       To find out what types of lookup tables your Postfix system supports use  the  "**postconf  -m**"
       command.

       To test Postfix NIS+ lookup tables, use the "**postmap -q**" command as described in the SYNOPSIS
       above.

## QUERY SYNTAX
       Most  of  the  NIS+ query is specified via the NIS+ map name. The general format of a Postfix
       NIS+ map name is as follows:

           **nisplus:[_**name_**=%s];_**name.name.name_**.:_**column_

       Postfix NIS+ map names differ from what one normally would use with commands such as **niscat**:

       •      With each NIS+ table lookup, "**%s**" is replaced by  a  version  of  the  lookup  string.
              There can be only one "**%s**" instance in a Postfix NIS+ map name.

       •      Postfix NIS+ map names use "**;**" instead of "**,**", because the latter character is special
              in  the  Postfix main.cf file.  Postfix replaces "**;**" characters in the map name by "**,**"
              before making NIS+ queries.

       •      The ":_column_" part in the NIS+ map name is not part of the actual NIS+ query. Instead,
              it specifies the number of the table column that provides the lookup result.  When  no
              ":_column_" is specified the first column (1) is used.

## EXAMPLE
       A NIS+ aliases map might be queried as follows:

           alias_maps = dbm:/etc/mail/aliases,
               nisplus:[alias=%s];mail_aliases.org_dir.$mydomain.:1

       This queries the local aliases file before the NIS+ file.

## SEE ALSO
       [postmap(1)](https://www.chedong.com/phpMan.php/man/postmap/1/markdown), Postfix lookup table manager

## 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)**
       Geoff Gibbs
       UK-HGMP-RC
       Hinxton
       Cambridge
       CB10 1SB, UK

       Adopted and adapted by:
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

                                                                                    [_NISPLUS_TABLE_(5)](https://www.chedong.com/phpMan.php/man/NISPLUSTABLE/5/markdown)