The FORWARD utility is designed to provide controlled access to
    the system alias database for regular unprivileged users. Users
    can establish an alias for the address corresponding to their
    own username, or any subaddresses associated with their address.
    There are no restrictions on what the alias is directed to. A
    privileged user can use this utility to set up a system alias for
    any address.

    If no parameter is given FORWARD simply displays current
    forwarding information from the alias database without changing
    it.

    PMDF FORWARD also checks to see if a logical name of the form
    PMDF_forwarding-address_PATTERN is defined. If such a logical
    name is defined, PMDF will translate it and use the equivalence
    name as the forwarding-address. The equivalence name is also
    scanned and the following substitutions are performed:

    1. $U and $u are replaced with the username whose forwarding
       address is being set. Subaddresses are removed; only the
       actual username is substituted.

    2. $F and $f are replaced with the address being forwarded. This
       includes both the username and any subaddresses.

    3. $D and $d are not replaced with anything, but if present set a
       flag that causes the alias to be deleted if it already exists.

    4. $$ is replaced with a single $; $ followed by any other
       character is replaced with just the character.

    System managers enable the FORWARD utility by creating an alias
    database with the CRDB utility. This can be done with the command

     $ PMDF CRDB NLA0: PMDF_ALIAS_DATABASE

    Skip this step if you already have an alias database.