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MIXER (Mime Internet X.400 Enhanced Relay): Mapping between X.400 and RFC 822/MIME
RFC 2156

Document type: RFC - Proposed Standard (January 1998; No errata)
Updates RFC 822
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Document shepherd: No shepherd assigned

IESG State: RFC 2156 (Proposed Standard)
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                                         S. Kille
Request for Comments: 2156                                  Isode Ltd.
Obsoletes: 987, 1026, 1138, 1148, 1327, 1495              January 1998
Updates: 822
Category: Standards Track

              MIXER (Mime Internet X.400 Enhanced Relay):
                 Mapping between X.400 and RFC 822/MIME

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Table of Contents

   1          - Overview ......................................    3
   1.1        - X.400 .........................................    3
   1.2        - RFC 822 and MIME ..............................    3
   1.3        - The need for conversion .......................    4
   1.4        - General approach ..............................    4
   1.5        - Gatewaying Model ..............................    5
   1.6        - Support of X.400 (1984) .......................    8
   1.7        - X.400 (1992) ..................................    8
   1.8        - MIME ..........................................    8
   1.9        - Body Parts ....................................    8
   1.10       - Local and Global Scenarios ....................    9
   1.11       - Compatibility with previous versions ..........   10
   1.12       - Aspects not covered ...........................   10
   1.13       - Subsetting ....................................   11
   1.14       - Specification Language ........................   11
   1.15       - Related Specifications ........................   11
   1.16       - Document Structure ............................   12
   1.17       - Acknowledgements ..............................   12
   2          - Service Elements ..............................   13
   2.1        - The Notion of Service Across a Gateway ........   13
   2.2        - RFC 822 .......................................   15
   2.3        - X.400 .........................................   18
   3          - Basic Mappings ................................   27
   3.1        - Notation ......................................   27

Kille                       Standards Track                     [Page 1]
RFC 2156                         MIXER                      January 1998

   3.2        - ASCII and IA5 .................................   29
   3.3        - Standard Types ................................   29
   3.4        - Encoding ASCII in Printable String ............   33
   3.5        - RFC 1522 ......................................   34
   4          - Addressing and Message IDs ....................   35
   4.1        - A textual representation of MTS.ORAddress .....   36
   4.2        - Global Address Mapping ........................   43
   4.3        - EBNF.822-address <-> MTS.ORAddress ............   46
   4.4        - Repeated Mappings .............................   59
   4.5        - Directory Names ...............................   62
   4.6        - MTS Mappings ..................................   62
   4.7        - IPMS Mappings .................................   67
   5          - Detailed Mappings .............................   71
   5.1        - RFC 822 -> X.400: Detailed Mappings ...........   71
   5.2        - Return of Contents ............................   86
   5.3        - X.400 -> RFC 822: Detailed Mappings ...........   86
   Appendix A - Mappings Specific to SMTP .....................  114
   1          - Probes ........................................  114
   2          - Long Lines ....................................  114
   3          - SMTP Extensions ...............................  114
   3.1        - SMTP Extension mapping to X.400 ...............  114
   3.2        - X.400 Mapping to SMTP Extensions ..............  115
   Appendix B - Mapping with X.400(1984) ......................  116
   Appendix C - RFC 822 Extensions for X.400 access ...........  118
   Appendix D - Object Identifier Assignment ..................  119
   Appendix E - BNF Summary ...................................  120
   Appendix F - Text format for MCGAM distribution ............  127
   1          - Text Formats ..................................  127
   2          - Mechanisms to register and to distribute
                MCGAMs ........................................  127
   3          - Syntax Definitions ............................  128
   4          - Table Lookups .................................  129
   5          - Domain -> OR Address MCGAM format .............  129

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