NAME

       courierldapaliasd - LDAP-based mail aliasing

SYNOPSIS

       courierldapaliasd {start}

       courierldapaliasd {stop}

       courierldapaliasd {restart}

       courierldapaliasd {query} {source} {address}

DESCRIPTION

       courierldapaliasd supports mail address aliasing, as implemented by makealiases(8)[1] but using an LDAP
       directory instead of a GDBM or a DB database. The term "aliasing" refers to substituting one or more
       addresses for another address. A one-to-one substitution results in the Courier mail server accepting
       mail for one address, and delivering the mail to another address. A one-to-many substitution results in
       the Courier mail server accepting mail for one address, and delivering a separate copy of the message to
       every address defined by the alias.

       makealiases(8)[1] uses a GDBM or a DB database to perform the aliasing function.  courierldapaliasd uses
       an LDAP directory instead.

       "courierldapaliasd start" runs the courierldapaliasd process in the background, and should be executed at
       system startup. "courierldapaliasd stop" stops the background process. "courierldapaliasd restart"
       restarts the process, and rereads the ldapaliasrc configuration file to pick up any changes.
       courierldapaliasd restart must be executed in order for any changes to ldapaliasrc to take place.

       courierldapaliasd runs in the background and opens a persistent connection to the LDAP directory, and
       checks every recipient address using the persistent connection.  courierldapaliasd automatically starts
       an adjustable number of multiple processes. With persistent connections being used, this allows alias
       checking to be as efficient and quick as possible.

       "courierldapaliasd query source address" is a diagnostic tool. It requires that courierldapaliasd must
       already be running in the background; it sends a query for address to the background process, and prints
       the result. Like makealiases(8)[1], it is possible to create aliases that are accessible only to certain
       sources of mail, like "esmtp" or "local". The "source" argument specifies the source of the address, such
       as "local", "esmtp", or "uucp".

CONFIGURATION

       courierldapaliasd requires OpenLDAP client libraries, and is installed automatically if OpenLDAP client
       libraries are available at installation time. The default ldapaliasrc configuration file contains
       additional instructions for configuring LDAP-based aliasing.

FILES

       /usr/sbin/courierldapaliasd

       /etc/courier/ldapaliasrc

SEE ALSO

       dot-courier(5)[2], courier(8)[3], makealiases(8)[1], makeuserdb(8)[4].

AUTHOR

       Sam Varshavchik
           Author

NOTES

        1.

           makealiases(8)
           http://www.courier-mta.org/makealiases.html

        2.

           dot-courier(5)
           http://www.courier-mta.org/dot-courier.html

        3.

           courier(8)
           http://www.courier-mta.org/courier.html

        4.

           makeuserdb(8)
           http://www.courier-mta.org/makeuserdb.html

Courier Mail Server                                10/28/2020                               COURIERLDAPALIASD(8)