RFC 1405 (rfc1405) - Page 1 of 19

Mapping between X

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Network Working Group                                       C. Allocchio
Request for Comments: 1405                              I.N.F.N. - Italy
                                                            January 1993


       Mapping between X.400(1984/1988) and Mail-11 (DECnet mail)

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  Discussion and suggestions for improvement are requested.
   Please refer to the current edition of the "IAB Official Protocol
   Standards" for the standardization state and status of this protocol.
   Distribution of this memo is unlimited.

Abstract

   This document describes a set of mappings which will enable inter
   working between systems operating the CCITT X.400 ( 1984 / 1988 )
   Recommendations on Message Handling Systems, and systems running the
   Mail-11 (also known as DECnet mail) protocol. The specifications are
   valid within DECnet Phase IV addressing and routing scheme.

   The complete scenario of X.400 / RFC 822 / Mail-11 is also considered,
   in order to cover the possible complex cases arising in multiple
   gateway translations.

   This document covers mainly the O/R address to DECnet from/to address
   mapping (and vice versa); other mappings are based on RFC 1327 and
   its eventual future updates.

   This is a combined effort of COSINE S2.2, the RARE MSG Working Group,
   and the IETF X.400 Ops Working Group.

Chapter 1 - Introduction

1.1. X.400

   The standard referred shortly into this document as "X.400" relates
   to the CCITT 1984 and 1988 X.400 Series Recommendations covering the
   Message Oriented Text Interchange Service (MOTIS). This document
   covers the Inter Personal Messaging System (IPMS) only.

1.2. Mail-11

   Mail-11, also known as DECnet mail and often improperly referred as
   VMSmail, is the proprietary protocol implemented by Digital Equipment
   Corporation (DEC) to establish a real-time text messaging system



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