Message Submission for Mail
RFC 4409
| Document | Type |
RFC - Draft Standard
(April 2006; Errata)
Obsoleted by RFC 6409
Obsoletes RFC 2476
Was draft-gellens-submit-bis (individual in app area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4409 (Draft Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ted Hardie | ||
| Send notices to | (None) | ||
Network Working Group R. Gellens
Request for Comments: 4409 QUALCOMM
Obsoletes: 2476 J. Klensin
Category: Standards Track April 2006
Message Submission for Mail
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 (2006).
Abstract
This memo splits message submission from message relay, allowing each
service to operate according to its own rules (for security, policy,
etc.), and specifies what actions are to be taken by a submission
server.
Message relay and final delivery are unaffected, and continue to use
SMTP over port 25.
When conforming to this document, message submission uses the
protocol specified here, normally over port 587.
This separation of function offers a number of benefits, including
the ability to apply specific security or policy requirements.
Gellens & Klensin Standards Track [Page 1]
RFC 4409 Message Submission for Mail April 2006
Table of Contents
1. Introduction ....................................................3
2. Document Information ............................................4
2.1. Definitions of Terms Used in This Memo .....................4
2.2. Conventions Used in This Document ..........................5
3. Message Submission ..............................................5
3.1. Submission Identification ..................................5
3.2. Message Rejection and Bouncing .............................5
3.3. Authorized Submission ......................................6
4. Mandatory Actions ...............................................7
4.1. General Submission Rejection Code ..........................7
4.2. Ensure All Domains Are Fully-Qualified .....................7
4.3. Require Authentication .....................................8
5. Recommended Actions .............................................8
5.1. Enforce Address Syntax .....................................8
5.2. Log Errors .................................................8
6. Optional Actions ................................................9
6.1. Enforce Submission Rights ..................................9
6.2. Enforce Permissions ........................................9
6.3. Check Message Data .........................................9
6.4. Support for the Postmaster Address .........................9
7. Interaction with SMTP Extensions ...............................10
8. Message Modifications ..........................................11
8.1. Add 'Sender' ..............................................11
8.2. Add 'Date' ................................................11
8.3. Add 'Message-ID' ..........................................11
8.4. Transfer Encode ...........................................11
8.5. Sign the Message ..........................................11
8.6. Encrypt the Message .......................................12
8.7. Resolve Aliases ...........................................12
8.8. Header Rewriting ..........................................12
9. Security Considerations ........................................12
10. IANA Considerations ...........................................13
11. Acknowledgements ..............................................13
12. Normative References ..........................................14
13. Informative References ........................................14
Gellens & Klensin Standards Track [Page 2]
RFC 4409 Message Submission for Mail April 2006
1. Introduction
SMTP was defined as a message *transfer* protocol, that is, a means
to route (if needed) and deliver finished (complete) messages.
Message Transfer Agents (MTAs) are not supposed to alter the message
text, except to add 'Received', 'Return-Path', and other header
fields as required by [SMTP-MTA].
However, SMTP is now also widely used as a message *submission*
protocol, that is, a means for Message User Agents (MUAs) to
introduce new messages into the MTA routing network. The process
Show full document text