Displays SMTP routing information. If you omit destination, you
    see the entries in the local Mail Exchange (MX) database. If you
    specify destination, you see all the entries in all the databases
    that TCP/IP Services would look at, if necessary, to resolve the
    address.

    To send mail, SMTP looks up addresses in one or more databases
    (if necessary) in the following order:

    1. Local MX databse

    2. Remote MX database

    3. BIND server database

    4. Local hosts database

    Related command: SET MX_RECORD

    Format

      SHOW MX_RECORD  [ destination ]

                      [ /GATEWAY=host ]

                      [ /OUTPUT=file ]