RFC 2157 · PROPOSED STANDARD · 1998
MON · 14 SEP 2026
Mapping between X.400 and RFC-822/MIME Message Bodies
Overview
RFC 2157, “Mapping between X.400 and RFC-822/MIME Message Bodies”, is a Proposed Standard document published in January 1998 by H. Alvestrand. The canonical text is published by the RFC Editor.
Abstract
This document defines how to map body parts of X.400 messages into MIME entities and vice versa, including the handling of multipart messages and forwarded messages. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 2157 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1998
- RFC 2156 MIXER : Mapping between X.400 and RFC 822/MIME
- RFC 2158 X.400 Image Body Parts
- RFC 2159 A MIME Body Part for FAX
- RFC 2160 Carrying PostScript in X.400 and MIME
- RFC 2161 A MIME Body Part for ODA
- RFC 2162 MaXIM-11 - Mapping between X.400 / Internet mail and Mail-11 mail
- RFC 2163 Using the Internet DNS to Distribute MIXER Conformant Global Address Mapping
- RFC 2164 Use of an X.500/LDAP directory to support MIXER address mapping