/X_PS_QUALIFIERS=qualifiers

    This qualifier can be used to specify the contents of the X-
    ps-qualifiers: header line. If this qualifier is not used, any
    existing X-ps-qualifiers: header line is used; if none exists no
    X-ps-qualifiers: header line will appear in the outgoing message
    unless the PMDF_X_PS_QUALIFIERS logical is defined.