Use the RELEASE command to release any messages previously marked
    as held, re-enter them in the queue cache database, and run the
    associated channel so the messages can be processed. Messages
    which have been held can be listed with the DIRECTORY/HELD
    command.

    The messages to be released are specified by their message
    identification numbers shown by the most recent DIRECTORY
    command. That number appears in the leftmost column of the
    DIRECTORY command listing. Ambiguous message numbers must be
    qualified by the proper channel name with the /CHANNEL qualifier.