/MULTIPLE
       /SINGLE (default)

    Normally, only a single prompt is made for each type of address
    selected with the /TO_PROMPT, /CC_PROMPT, and /BCC_PROMPT
    qualifiers. When /MULTIPLE is specified, these prompts will be
    repeated for each selected address type until a blank line is
    entered.

    The /MULTIPLE and /SINGLE qualifiers have no effect on
    interactive PMDF MAIL sessions.