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Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples (RFC2049)

IP.com Disclosure Number: IPCOM000004276D
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2019-Feb-16
Document File: 24 page(s) / 32K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

N. Freed: AUTHOR [+1]

Related Documents

10.17487/RFC2049: DOI

Abstract

This set of documents, collectively called the Multipurpose Internet Mail Extensions, or MIME, redefines the format of messages. This fifth and final document describes MIME conformance criteria as well as providing some illustrative examples of MIME message formats, acknowledgements, and the bibliography. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group N. Freed Request for Comments: 2049 Innosoft Obsoletes: 1521, 1522, 1590 N. Borenstein Category: Standards Track First Virtual November 1996

Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples

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.

Abstract

STD 11, RFC 822, defines a message representation protocol specifying considerable detail about US-ASCII message headers, and leaves the message content, or message body, as flat US-ASCII text. This set of documents, collectively called the Multipurpose Internet Mail Extensions, or MIME, redefines the format of messages to allow for

(1) textual message bodies in character sets other than US-ASCII,

(2) an extensible set of different formats for non-textual message bodies,

(3) multi-part message bodies, and

(4) textual header information in character sets other than US-ASCII.

These documents are based on earlier work documented in RFC 934, STD 11, and RFC 1049, but extends and revises them. Because RFC 822 said so little about message bodies, these documents are largely orthogonal to (rather than a revision of) RFC 822.

The initial document in this set, RFC 2045, specifies the various headers used to describe the structure of MIME messages. The second document defines the general structure of the MIME media typing system and defines an initial set of media types. The third document, RFC 2047, describes extensions to RFC 822 to allow non-US-

Freed & Borenstein Standards Track [Page 1]

RFC 2049 MIME Conformance November 1996

ASCII text data in Internet mail header fields. The fourth document, RFC 2048, specifies various IANA registration procedures for MIME- related facilities. This fifth and final document describes MIME conformance criteria as well as providing some illustrative examples of MIME message formats, acknowledgements, and the bibliography.

These documents are revisions of RFCs 1521, 1522, and 1590, which themselves were revisions of RFCs 1341 and 1342. Appendix B of this document describes differences and changes from previous versions.

Table of Contents

1. Introduction .......................................... 2 2. MIME Conformance ...................................... 2 3. Guidelines for Sending Email Data ..................... 6 4. Canonical Encoding Model .............................. 9 5. Summary ............................................... 12 6. Security Considerations ............................... 12 7. Authors’ Addresses .................................... 12 8. Acknowledgements ...................................... 13 A. A Complex Multipart Example ........................... 15 B. Changes from RFC 1521, 152...

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