1    /ALL

       /ALL
       /NOALL (default)

    Delete all messages shown by the last DIRECTORY command. When
    used in conjunction with the /CHANNEL qualifier, only those
    messages shown by the last DIRECTORY command for the specified
    channel will be deleted.

    Unless /NOCONFIRM is specified with /ALL, you will be required to
    confirm any DELETE/ALL operation.

2    /CHANNEL

       /CHANNEL=name

    Specifies the name of the channel from which to delete messages.
    Wildcards are not permitted.

3    /CONFIRM

       /CONFIRM
       /NOCONFIRM (default)

    When /CONFIRM is specified, you will be prompted to confirm each
    message delete operation.

4    /LOG

       /LOG (default)
       /NOLOG

    Specifies whether informational messages for each message delete
    operation are generated.