/FROM=address

    This qualifier can be used to specify the contents of the From:
    header line. If this qualifier is not used, any existing From:
    header line is used; if none exists and the PMDF_FROM logical is
    not defined, then a From: header line will be constructed from
    the username of the user invoking SEND and from the local host
    name. Note that even if a From: address is provided your address
    will appear in a Sender: header line.