Name_table_name MTA option
Alias and address MTA options:
name_table_name (string; OpenVMS only)
name_table_name MTA option specifies the name of a logical name table to be searched for address aliases by the MTA. This table name may itself be a logical name (in the process or system directory) which specifies one or more tables to search. This option has no default; if it is not specified logical name tables are not searched for aliases.