rfc2822 April 2001
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Network Working Group P. Resnick, Editor
Request for Comments: 2822 QUALCOMM Incorporated
Obsoletes: 822 April 2001
Category: Standards Track
Internet Message Format
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 (2001). All Rights Reserved.
Abstract
This standard specifies a syntax for text messages that are sent
between computer users, within the framework of "electronic mail"
messages. This standard supersedes the one specified in Request For
Comments (RFC) 822, "Standard for the Format of ARPA Internet Text
Messages", updating it to reflect current practice and incorporating
incremental changes that were specified in other RFCs.
Table of Contents
1. Introduction ............................................... 3
1.1. Scope .................................................... 3
1.2. Notational conventions ................................... 4
1.2.1. Requirements notation .................................. 4
1.2.2. Syntactic notation ..................................... 4
1.3. Structure of this document ............................... 4
2. Lexical Analysis of Messages ............................... 5
2.1. General Description ...................................... 5
2.1.1. Line Length Limits ..................................... 6
2.2. Header Fields ............................................ 7
2.2.1. Unstructured Header Field Bodies ....................... 7
2.2.2. Structured Header Field Bodies ......................... 7
2.2.3. Long Header Fields ..................................... 7
2.3. Body ..................................................... 8
3. Syntax ..................................................... 9
3.1. Introduction ............................................. 9
3.2. Lexical Tokens ........................................... 9
3.2.1. Primitive Tokens ....................................... 9
3.2.2. Quoted characters ......................................10
3.2.3. Folding white space and comments .......................11
3.2.4. Atom ...................................................12
3.2.5. Quoted strings .........................................13
3.2.6. Miscellaneous tokens ...................................13
3.3. Date and Time Specification ..............................14
3.4. Address Specification ....................................15
3.4.1. Addr-spec specification ................................16
3.5 Overall message syntax ....................................17
3.6. Field definitions ........................................18
3.6.1. The origination date field .............................20
3.6.2. Originator fields ......................................21
3.6.3. Destination address fields .............................22
3.6.4. Identification fields ..................................23
3.6.5. Informational fields ...................................26
3.6.6. Resent fields ..........................................26
3.6.7. Trace fields ...........................................28
3.6.8. Optional fields ........................................29
4. Obsolete Syntax ............................................29
4.1. Miscellaneous obsolete tokens ............................30
4.2. Obsolete folding white space .............................31
4.3. Obsolete Date and Time ...................................31
4.4. Obsolete Addressing ......................................33
4.5. Obsolete header fields ...................................33
4.5.1. Obsolete origination date field ........................34
4.5.2. Obsolete originator fields .............................34
4.5.3. Obsolete destination address fields ....................34
4.5.4. Obsolete identification fields .........................35
4.5.5. Obsolete informational fields ..........................35
4.5.6. Obsolete resent fields .................................35
4.5.7. Obsolete trace fields ..................................36
4.5.8. Obsolete optional fields ...............................36
5. Security Considerations ....................................36
6. Bibliography ...............................................37
7. Editor's Address ...........................................38
8. Acknowledgements ...........................................39
Appendix A. Example messages ..................................41
A.1. Addressing examples ......................................41
A.1.1. A message from one person to another with simple
addressing .............................................41
A.1.2. Different types of mailboxes ...........................42
A.1.3. Group addresses ........................................43
A.2. Reply messages ...........................................43
A.3. Resent messages ..........................................44
A.4. Messages with trace fields ...............................46
A.5. White space, comments, and other oddities ................47
A.6. Obsoleted forms ..........................................47
A.6.1. Obsolete addressing ....................................48
A.6.2. Obsolete dates .........................................48
A.6.3. Obsolete white space and comments ......................48
Appendix B. Differences from earlier standards ................49
Appendix C. Notices ...........................................50
Full Copyright Statement ......................................51
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#Diff to first older
--- ../s-o-1036/TOC.out June 1994
+++ ../rfc2822/TOC.out April 2001
@@ -1,72 +1,103 @@
- News Article Format and Transmission
-
- Henry Spencer
+Network Working Group P. Resnick, Editor
+Request for Comments: 2822 QUALCOMM Incorporated
+Obsoletes: 822 April 2001
+Category: Standards Track
+ Internet Message Format
Status of this Memo
-This document is intended to become an Internet Draft.
-Internet Drafts are working documents of the Internet Engi-
-neering Task Force (IETF), its Areas, and its Working
-Groups. Note that other groups may also distribute working
-documents as Internet Drafts.
-
-Internet Drafts are draft documents valid for a maximum of
-six months. Internet Drafts may be updated, replaced, or
-obsoleted by other documents at any time. It is not appro-
-priate to use Internet Drafts as reference material or to
-cite them other than as a "working draft" or "work in
-progress".
-
-Please check the I-D abstract listing contained in each
-Internet Draft directory to learn the current status of this
-or any other Internet Draft. (Actually, this draft is at
-too early a stage to even be listed there yet.)
-
-It is hoped that a later version of this Draft will obsolete
-RFC 1036 and will become an Internet standard.
-
-References to the "successor to this Draft" refer not to
-later versions of this draft, but to a hypothetical future
-rewrite of this Draft (in the same way that this Draft is a
-rewrite of RFC 1036).
+ 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.
-Distribution of this memo is unlimited.
+Copyright Notice
+ Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract
-This Draft defines the format and procedures for interchange
-of network news articles. It is hoped that a later version
-of this Draft will obsolete RFC 1036, reflecting more recent
-experience and accommodating future directions.
-
-Network news articles resemble mail messages but are broad-
-cast to potentially-large audiences, using a flooding algo-
-rithm that propagates one copy to each interested host (or
-group thereof), typically stores only one copy per host, and
-does not require any central administration or systematic
-registration of interested users. Network news originated
-as the medium of communication for Usenet, circa 1980.
-
-INTERNET DRAFT to be NEWS sec. -
-
-
-Since then Usenet has grown explosively, and many Internet
-sites participate in it. In addition, the news technology
-is now in widespread use for other purposes, on the Internet
-and elsewhere.
-
-This Draft primarily codifies and organizes existing prac-
-tice. A few small extensions have been added in an attempt
-to solve problems that are considered serious. Major exten-
-sions (e.g. cryptographic authentication) that need signifi-
-cant development effort are left to be undertaken as inde-
-pendent efforts.
-
+ This standard specifies a syntax for text messages that are sent
+ between computer users, within the framework of "electronic mail"
+ messages. This standard supersedes the one specified in Request For
+ Comments (RFC) 822, "Standard for the Format of ARPA Internet Text
+ Messages", updating it to reflect current practice and incorporating
+ incremental changes that were specified in other RFCs.
Table of Contents
-TBW
+ 1. Introduction ............................................... 3
+ 1.1. Scope .................................................... 3
+ 1.2. Notational conventions ................................... 4
+ 1.2.1. Requirements notation .................................. 4
+ 1.2.2. Syntactic notation ..................................... 4
+ 1.3. Structure of this document ............................... 4
+ 2. Lexical Analysis of Messages ............................... 5
+ 2.1. General Description ...................................... 5
+ 2.1.1. Line Length Limits ..................................... 6
+ 2.2. Header Fields ............................................ 7
+ 2.2.1. Unstructured Header Field Bodies ....................... 7
+ 2.2.2. Structured Header Field Bodies ......................... 7
+ 2.2.3. Long Header Fields ..................................... 7
+ 2.3. Body ..................................................... 8
+ 3. Syntax ..................................................... 9
+ 3.1. Introduction ............................................. 9
+ 3.2. Lexical Tokens ........................................... 9
+ 3.2.1. Primitive Tokens ....................................... 9
+ 3.2.2. Quoted characters ......................................10
+ 3.2.3. Folding white space and comments .......................11
+ 3.2.4. Atom ...................................................12
+ 3.2.5. Quoted strings .........................................13
+ 3.2.6. Miscellaneous tokens ...................................13
+ 3.3. Date and Time Specification ..............................14
+ 3.4. Address Specification ....................................15
+ 3.4.1. Addr-spec specification ................................16
+ 3.5 Overall message syntax ....................................17
+ 3.6. Field definitions ........................................18
+ 3.6.1. The origination date field .............................20
+ 3.6.2. Originator fields ......................................21
+ 3.6.3. Destination address fields .............................22
+ 3.6.4. Identification fields ..................................23
+ 3.6.5. Informational fields ...................................26
+ 3.6.6. Resent fields ..........................................26
+ 3.6.7. Trace fields ...........................................28
+ 3.6.8. Optional fields ........................................29
+ 4. Obsolete Syntax ............................................29
+ 4.1. Miscellaneous obsolete tokens ............................30
+ 4.2. Obsolete folding white space .............................31
+ 4.3. Obsolete Date and Time ...................................31
+ 4.4. Obsolete Addressing ......................................33
+ 4.5. Obsolete header fields ...................................33
+ 4.5.1. Obsolete origination date field ........................34
+ 4.5.2. Obsolete originator fields .............................34
+ 4.5.3. Obsolete destination address fields ....................34
+ 4.5.4. Obsolete identification fields .........................35
+ 4.5.5. Obsolete informational fields ..........................35
+ 4.5.6. Obsolete resent fields .................................35
+ 4.5.7. Obsolete trace fields ..................................36
+ 4.5.8. Obsolete optional fields ...............................36
+ 5. Security Considerations ....................................36
+ 6. Bibliography ...............................................37
+ 7. Editor's Address ...........................................38
+ 8. Acknowledgements ...........................................39
+ Appendix A. Example messages ..................................41
+ A.1. Addressing examples ......................................41
+ A.1.1. A message from one person to another with simple
+addressing .............................................41
+ A.1.2. Different types of mailboxes ...........................42
+ A.1.3. Group addresses ........................................43
+ A.2. Reply messages ...........................................43
+ A.3. Resent messages ..........................................44
+ A.4. Messages with trace fields ...............................46
+ A.5. White space, comments, and other oddities ................47
+ A.6. Obsoleted forms ..........................................47
+ A.6.1. Obsolete addressing ....................................48
+ A.6.2. Obsolete dates .........................................48
+ A.6.3. Obsolete white space and comments ......................48
+ Appendix B. Differences from earlier standards ................49
+ Appendix C. Notices ...........................................50
+ Full Copyright Statement ......................................51