The PMDF POPSTORE or PMDF MSGSTORE command line management
    utility is an interactive, command oriented interface for
    managing popstore and MessageStore accounts. Users with operating
    system privileges as well as users with privileged popstore or
    MessageStore accounts can use the utility. Also, the utility can
    be used as a report generator as described in the PMDF popstore &
    MessageStore Manager's Guide.

    To run the utility, issue the DCL command

    $ PMDF POPSTORE

    or

    $ PMDF MSGSTORE

    Use the EXIT or QUIT command to exit the utility.