The DIRECTORY command provides a listing of the available mailing
    lists.

    The list-spec parameter is optional and, if omitted, defaults to
    "*". Generally, there is no need to use this parameter unless you
    are interested in a specific mailing list. For instance, if you
    merely want to know if there is a mailing list about zeugmes, you
    might use the command

    DIRECTORY/LIST *ZEUGME*

    This will provide you with the names of any mailing lists which
    contain the phrase "zeugme" in them. Note that just because a
    mailing list is available does not necessarily mean that you can
    subscribe to it. The site might have established restrictions
    governing who can or cannot subscribe to some or all mailing
    lists.