PMDF QM is a utility program which allows inspection and
    manipulation of queued messages. PMDF QM has two modes:
    maintenance mode and user mode. Maintenance mode can be used
    to inspect and manipulate the channel queue directories and
    the messages contained in them. Privileges sufficient to read,
    create, and delete files in the channel queue directory tree as
    well as read and update the queue cache database are required to
    use maintenance mode. User mode is a very restricted version of
    maintenance mode which allows unprivileged users to read their
    own messages from the queues and to return them (bounce them)
    back to their originator if desired. Users' own messages are
    messages which they themselves have sent or were posted to a list
    they own. They are not messages destined for the user. Users can
    read or return any of their own queued messages, and, in the case
    of outgoing PMDF-FAX messages, change FAX telephone numbers.

    Note that this utility merely reports on messages in PMDF's
    delivery queues. That a message you have sent no longer appears
    in PMDF's queues, does not imply that it has reached its final
    destination. All that it means is that the message has left the
    PMDF system and is no longer under PMDF's control. For example,
    it is not uncommon for a message to make an intermediate stop
    on another system such as a mail hub. In such cases, PMDF will
    consider the message to be "delivered" when it hands the message
    and responsibility for it off to the intermediate system.

    To run PMDF QM in user mode, issue the command

    $ PMDF QM

    To run PMDF QM in maintenance mode, issue the command

    $ PMDF QM/MAINTENANCE

    Use the EXIT or QUIT command to exit PMDF QM.

    The commands accepted by this utility are described under the
    User_mode_commands and Maintenance_mode_commands subtopics.