RFC 2162 (rfc2162) - Page 3 of 34

MaXIM-11 - Mapping between X

RFC 2162                        MaXIM-11                    January 1998


   This document also covers the case of Mail-11 systems implementing
   the "foreign mail protocol" allowing Mail-11 to interface other mail
   systems, including RFC 822 based system.

Chapter 2 - Message Elements

2.1. Service Elements

   Mail-11 protocol offers a very restricted set of elements composing a
   Inter Personal Message (IPM), whereas X.400 and RFC 822/MIME
   specifications support a complex and large amount of service
   elements.  Considering the case where a message is relayed between
   two X.400 MHS or MIME Message Transport System (MTS) via a Mail-11
   messaging system this could result in a nearly complete loss of
   information.

   To minimise the inconvenience, any of the X.400 or MIME service
   elements which do not map directly into Mail-11 equivalent ones
   accordingly to this specification, will be included into Mail-11 text
   body parts as an additional RFC 822-like header; this additional
   header will be inserted between the Mail-11 P2 headers (From:, To:,
   CC:, Subj:) and the other Mail-11 bodyparts. In particular, X.400
   elements will also be at first converted into textual representation
   before insertion.

   An example, where a multimedia message has been encoded into mail-11
   after having crossed also a MIME-MHS (MIXER conformant) gateway:

     From:  smtp%"Admin@SURFnet.nl"  "Erik"  18-OCT-1994 13:55:00.49
     To:    ALLOCCHIO
     CC:    smtp%"netman@MailFLOW.dante.net"
     Subj:  enjoy this nice picture!

     X400-Originator: root@sun3.SURFnet.nl
     X400-Recipients: Allocchio@elettra.ts.it, netman@MailFLOW.dante.net
     Sender: Erik Newmann root@SURFnet.nl>
     Organisation: SURFnet bv
     Mime-Version: 1.0
     Content-Type: multipart/mixed; boundary="----- =_aaaaaa0"
     Content-ID: 21223.78342785@SURFnet.nl>

     ------- =_aaaaaa0
     Content-Type: text/plain; charset="us-ascii"
     Content-ID: 21223.78342785@SURFnet.nl>

     look... you never saw this one!!
     I just include the picture in the next bodypart
     and I hope you get it fine.



Allocchio                     Experimental