8. Appendix C - RFC 822^std11(-> 2822^prop) Extensions for X.400 access

   This appendix defines a number of optional mappings which may be
   provided to give access from RFC 822std11(-> 2822prop) to a number of X.400 services.
   These mappings are beyond the basic scope of this specification.
   There has been a definite demand to use extended RFC 822std11(-> 2822prop) as a
   mechanism to access X.400, and these extensions provide access to
   certain features.  If this functionality is provided, this appendix
   shall be followed.  The following headings are defined:

         extended-heading =
             "Prevent-NonDelivery-Report" ":"
             / "Generate-Delivery-Report" ":"
             / "Alternate-Recipient" ":" prohibition
             / "Disclose-Recipients" ":"  prohibition
             / "X400-Content-Return" ":" prohibition

   Prevent-NonDelivery-Report and Generate-Delivery-Report allow setting
   of MTS.PerRecipientSubmissionFields.originator-report-request.  The
   setting will be the same for all recipients.

   Alternate-Recipient, Disclose-Recipients, and X400-Content-Return
   allow for override of the default settings for
   MTS.PerMessageIndicators.

   Use of NOTARY mechanisms is a preferred meachanism for controlling
   these parameters.