Simple Mail Transfer Protocol extension for Message Transfer Priorities
draft-melnikov-smtp-priority-18
| The information below is for an old version of the document | |||
|---|---|---|---|
| Document | Type | Active Internet-Draft (individual in app area) | |
| Last updated | 2012-06-11 | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | None | ||
| IESG | IESG state | IESG Evaluation::AD Followup | |
| Consensus Boilerplate | Unknown | ||
| Telechat date |
Needs a YES. Needs 9 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Pete Resnick | ||
| Send notices to | alexey.melnikov@isode.com, carlberg@g11.org.uk, draft-melnikov-smtp-priority@tools.ietf.org, barryleiba@computer.org | ||
Network Working Group A. Melnikov
Internet-Draft Isode Ltd
Intended status: Standards Track K. Carlberg
Expires: December 13, 2012 G11
June 11, 2012
Simple Mail Transfer Protocol extension for Message Transfer Priorities
draft-melnikov-smtp-priority-18
Abstract
This memo defines an extension to the SMTP (Simple Mail Transfer
Protocol) service whereby messages are given a label to indicate
preferential handling, to enable mail handling nodes to take this
into account for onward processing.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on December 13, 2012.
Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Melnikov & Carlberg Expires December 13, 2012 [Page 1]
Internet-Draft Message Transfer Priority SMTP Extension June 2012
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 4
3. Definition of the Priority SMTP Extension . . . . . . . . . . 4
4. Handling of messages received via SMTP . . . . . . . . . . . . 5
4.1. Handling of the MT-PRIORITY parameter by the receiving
SMTP server . . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Relay of messages to other conforming SMTP servers . . . . 6
4.3. Relay of messages to non-conforming SMTP servers . . . . . 6
4.4. Mailing lists and Aliases . . . . . . . . . . . . . . . . 7
4.5. Gatewaying a message into a foreign environment . . . . . 7
4.6. Interaction with DSN SMTP Extension . . . . . . . . . . . 7
5. The Priority Service Extension . . . . . . . . . . . . . . . . 7
5.1. Expedited Transfer . . . . . . . . . . . . . . . . . . . . 9
5.2. Timely Delivery . . . . . . . . . . . . . . . . . . . . . 9
6. Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8. Deployment Considerations . . . . . . . . . . . . . . . . . . 11
8.1. Multiple MX records . . . . . . . . . . . . . . . . . . . 11
8.2. Consistent priority handling policy . . . . . . . . . . . 11
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
10. Security Considerations . . . . . . . . . . . . . . . . . . . 14
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
11.1. Normative References . . . . . . . . . . . . . . . . . . . 14
11.2. Informative References . . . . . . . . . . . . . . . . . . 15
Appendix A. Mapping of MT-PRIORITY parameter values for
Military Messaging . . . . . . . . . . . . . . . . . 16
Appendix B. Mapping of MT-PRIORITY parameter values for MIXER . . 17
Appendix C. Mapping of National Security / Emergency
Preparedness (NS/EP) Values . . . . . . . . . . . . . 17
Appendix D. Possible implementation strategies . . . . . . . . . 18
D.1. Probability . . . . . . . . . . . . . . . . . . . . . . . 18
D.2. Preemption of sessions or transactions . . . . . . . . . . 19
D.3. Resource Allocation Models . . . . . . . . . . . . . . . . 19
Appendix E. Background on Design Choices . . . . . . . . . . . . 20
Appendix F. Acknowledgements . . . . . . . . . . . . . . . . . . 20
Show full document text