The PMDF MAIL command invokes the PMDF MAIL utility which may be
    used to send network mail messages to other users and to read and
    manage mail messages sent to you.

    PMDF MAIL is an extended version of VMS MAIL. The extensions
    provide support for Internet style messaging and includes
    support for sending and reading MIME messages. MIME allows,
    among other things, for multipart messages which may contain
    file attachments, binary data, images, audio, and video.