Library /sys$common/syshlp/mailhelp.hlb
ANSWER, Qualifiers, /CC_PROMPT
 *Conan The Librarian 

       /CC_PROMPT
       /NOCC_PROMPT

    Enables the prompt for the CC: line in the mail header. At the
    CC: prompt, enter the names of other users to whom you want to
    send a copy of the mail message.

    The /NOCC_PROMPT qualifier disables the CC: prompt. The /CC_
    PROMPT and /NOCC_PROMPT qualifiers override the SET CC_PROMPT and
    SET NOCC_PROMPT commands.
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