Ldap ext port MTA option

LDAP external directory lookup MTA options:  (port)
The  MTA option takes a non-negative integer argument specifying the port for the LDAP external directory. If not set, this defaults to the value of the   MTA option  (which itself defaults to 389, the standard LDAP server port number).

See also:
 * LDAP external directory lookup MTA options
 * ldap_port MTA Option