Resolution of the Sender Policy Framework (SPF) and Sender ID Experiments
RFC 6686
Document | Type | RFC - Informational (July 2012; Errata) | |
---|---|---|---|
Author | Murray Kucherawy | ||
Last updated | 2018-12-20 | ||
Replaces | draft-kucherawy-spfbis-experiment | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | S Moonesamy | ||
Shepherd write-up | Show (last changed 2012-05-12) | ||
IESG | IESG state | RFC 6686 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Pete Resnick | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) M. Kucherawy Request for Comments: 6686 Cloudmark Category: Informational July 2012 ISSN: 2070-1721 Resolution of the Sender Policy Framework (SPF) and Sender ID Experiments Abstract In 2006, the IETF published a suite of protocol documents comprising the Sender Policy Framework (SPF) and Sender ID: two proposed email authentication protocols. Both of these protocols enable one to publish, via the Domain Name System, a policy declaring which mail servers were authorized to send email on behalf of the domain name being queried. There was concern that the two would conflict in some significant operational situations, interfering with message delivery. The IESG required all of these documents (RFC 4405, RFC 4406, RFC 4407, and RFC 4408) to be published as Experimental RFCs and requested that the community observe deployment and operation of the protocols over a period of two years from the date of publication to determine a reasonable path forward. After six years, sufficient experience and evidence have been collected that the experiments thus created can be considered concluded. This document presents those findings. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6686. Kucherawy Informational [Page 1] RFC 6686 SPF/Sender ID Experiments July 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. Table of Contents 1. Introduction ....................................................2 2. Definitions .....................................................3 3. Evidence of Deployment ..........................................3 3.1. DNS Resource Record Types ..................................3 3.2. Implementations ............................................5 3.3. The SUBMITTER SMTP Extension ...............................6 4. Evidence of Differences .........................................7 5. Analysis ........................................................7 6. Conclusions .....................................................8 7. Security Considerations .........................................9 8. References ......................................................9 8.1. Normative References .......................................9 8.2. Informative References .....................................9 Appendix A. Background on the RRTYPE Issue ........................10 Appendix B. Acknowledgments .......................................11 1. Introduction In April 2006, the IETF published the [SPF] and Sender ID email authentication protocols, the latter consisting of three documents ([SUBMITTER], [SENDER-ID], and [PRA]). Both of these protocols enable one to publish, via the Domain Name System, a policy declaring which mail servers are authorized to send email on behalf of the selected domain name. Consensus did not clearly support one protocol over the other, and there was significant concern that the two would conflict in some significant operational situations, interfering with message delivery. The IESG required the publication of all of these documents as Experimental, and requested that the community observe Kucherawy Informational [Page 2] RFC 6686 SPF/Sender ID Experiments July 2012 deployment and operation of the protocols over a period of two years from the date of publication in order to determine a reasonable pathShow full document text