DOKK / manpages / debian 12 / postfix / nisplus_table.5.en
NISPLUS_TABLE(5) File Formats Manual NISPLUS_TABLE(5)

nisplus_table - Postfix NIS+ client

postmap -q "string" "nisplus:[name=%s];name.name."
postmap -q - "nisplus:[name=%s];name.name." <inputfile


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.



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.
    • 











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.








postmap(1), Postfix lookup table manager










Use "postconf readme_directory" or
    "postconf html_directory" to locate this information.


DATABASE_README, Postfix lookup table overview










The Secure Mailer license must be distributed with this
  software.








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