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 | |||
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Document | Type | Active Internet-Draft (individual in app area) | |
Authors | Alexey Melnikov , Ken Carlberg | ||
Last updated | 2012-06-11 | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | None | ||
IESG | IESG state | IESG Evaluation::AD Followup | |
Consensus Boilerplate | Unknown | ||
Telechat date |
Needs 9 more YES or NO OBJECTION positions to pass. |
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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 Melnikov & Carlberg Expires December 13, 2012 [Page 2] Internet-Draft Message Transfer Priority SMTP Extension June 2012Show full document text