If you run 'MBUTIL', you will see the following help screen:

     +-------------------------------------------------------------------+
     | MBUTIL - RemoteAccess/QuickBBS Message Base Utility 1.10          |
     | Copyright (C) 1990 Gerard van der Land. All rights reserved.      |
     |                                                                   |
     | Usage:                                                            |
     |                                                                   |
     |    MBUTIL <command> [<parameters>]                                |
     |                                                                   |
     | Commands:                                                         |
     |                                                                   |
     |    Export      Export netmail messages and replace tearlines      |
     |    Import      Import netmail messages                            |
     |    Index       Create new index files                             |
     |    Link        Create reply chains and clean subjects             |
     |    Move        Move messages in one board to another board        |
     |    Pack        Pack the message base files                        |
     |    Post        Post a file as message in a specified board        |
     |    Purge       Delete messages according to age or number         |
     |    Sort        Sort unread or all messages by board/date/time     |
     |    Undelete    Undelete deleted messages                          |
     |                                                                   |
     | Run 'MBUTIL <command> ?' to get information about <parameters>.   |
     |                                                                   |
     | C:\RA>_                                                           |
     |                                                                   |
     +-------------------------------------------------------------------+

     Example:

        MBUTIL Purge ?

     This will give you  information about the Purge command  and its
     parameters. If a  parameter is  missing or invalid,  MBUTIL will
     also  show you a help screen.                                                .