Mapping between X.400(1984/1988) and Mail-11 (DECnet mail) (RFC1405)
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2000-Sep-12
Internet Society Requests For Comment (RFCs)
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.
Network Working Group C. Allocchio
Request for Comments: 1405 I.N.F.N. - Italy
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.
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 / RFC822 / Mail-11 is also considered,
in order to cover the possible complex cases arising in multiple
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
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.
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
among systems implementing the DECnet Phase IV networking protocols.
RFC822 was defined as a standard for personal messaging systems
within the DARPA Internet and is now diffused on top of many
different message transfer protocols, like SMTP, UUCP, BITNET, JNT
Grey Book, CSnet. Its mapping with X.400 is fully described in
RFC1327. In this document we will try to consider its relations with
1.4. The user community
The community using X.400 messaging system is currently growing in
the whole world, but there is still a number of very large
communities using Mail-11 based messaging systems willing to
communicate easily with X.400 based Message Handling Systems. Among
these large DECnet based networks we can include the High Energy
Physics network (HEPnet) and the Space Physics Analysis Network
These DECnet communities will in the future possibly migrate to
DECnet Phase V (DECnet-OSI) protocols, converting thus their
messaging systems to OSI specifications, i.e., merging into the X.400