Individual submission M. Kucherawy Internet-Draft Cloudmark, Inc. Updates: 5451 (if approved) February 12, 2012 Intended status: Standards Track Expires: August 15, 2012 Authentication-Results Registration Update for SPF Results draft-kucherawy-authres-spf-erratum-02 Abstract This memo updates the registry of authentication method results in Authentication-Results: message header fields, correcting a discontinuity between the original registry creation and the SPF specification. This memo updates RFC5451. 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 August 15, 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 Kucherawy Expires August 15, 2012 [Page 1] Internet-Draft Auth-Results SPF Erratum February 2012 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Keywords . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. New 'fail' definition . . . . . . . . . . . . . . . . . . . . . 3 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3 4.1. Addition of 'Status' Columns . . . . . . . . . . . . . . . 3 4.2. Update to Result Names . . . . . . . . . . . . . . . . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.1. Normative References . . . . . . . . . . . . . . . . . . . 4 6.2. Informative References . . . . . . . . . . . . . . . . . . 4 Appendix A. Examples in RFC5451 . . . . . . . . . . . . . . . . . 5 Appendix B. Acknowledgements . . . . . . . . . . . . . . . . . . . 5 Kucherawy Expires August 15, 2012 [Page 2] Internet-Draft Auth-Results SPF Erratum February 2012 1. Introduction [AUTHRES] defined a new header field for electronic mail messages that presents the results of a message authentication effort in a machine-readable format. That Request For Comments created a registry of results for a few message authentication mechanisms, one of which was the Sender Policy Framework [SPF]. The registry contains one entry that is inconsistent with the latter specification, which was noted in an erratum filed with the RFC Editor. This memo updates the IANA registries accordingly. 2. Keywords The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [KEYWORDS]. 3. New 'fail' definition The new "fail" result, replacing the existing "hardfail" result for [SPF] (and thus also for [SENDER-ID]) has the same definition for "hardfail" that was used in Section 2.4.2 of [AUTHRES], namely: This client is explicitly not authorized to inject or relay mail using the sender's DNS domain. 4. IANA Considerations This section enumerates requested actions of IANA, per [IANA]. 4.1. Addition of 'Status' Columns IANA is requested to amend the Email Authentication Methods and Email Authentication Result Names registries, both in the Email Authentication Parameters group, by adding to each a column called "Status" that will indicate for each entry its current standards status. Legal values for these columns are: active: The entry is in current use. deprecated: The entry is no longer in current use. New registrations to either table MUST specify one of these values. All exisitng entries, except as specified below, are to be noted as "active" as of publication of this memo. Kucherawy Expires August 15, 2012 [Page 3] Internet-Draft Auth-Results SPF Erratum February 2012 4.2. Update to Result Names [AUTHRES] listed "hardfail" as the result to be used when a message fails an [SPF] evaluation. However, this latter specification used the string "fail" to denote such failures. Therefore, IANA is requested to mark "hardfail" in the Email Authentication Result Names registry as "deprecated", and amend the "fail" entry as follows: Code: fail Defined: [AUTHRES] Auth Method: spf, sender-id Meaning: [this memo] Section 3 Status: active 5. Security Considerations This memo corrects a registry error. It is possible that older implementations will not recognize or use the corrected entry. Thus, implementers are advised to support both result strings for some period of time. However, it is known that some implementations are already using the SPF-defined result string. 6. References 6.1. Normative References [AUTHRES] Kucherawy, M., "Message Header Field for Indicating Message Authentication Status", RFC 5451, April 2009. [KEYWORDS] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. 6.2. Informative References [IANA] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, May 2008. [SENDER-ID] Lyon, J. and M. Wong, "Sender ID: Authenticating E-Mail", RFC 4406, April 2006. [SPF] Wong, M. and W. Schlitt, "Sender Policy Framework (SPF) Kucherawy Expires August 15, 2012 [Page 4] Internet-Draft Auth-Results SPF Erratum February 2012 for Authorizing Use of Domains in E-Mail, Version 1", RFC 4408, April 2006. Appendix A. Examples in RFC5451 It should be noted that this update also applies to the examples in [AUTHRES], specifically the one in Appendix B.5. The error there is not corrected by this update, which only deals with the normative portions of that specification and the related IANA registrations. However, it is assumed one could easily see what needs to be corrected there. Corrected examples will be included in a full update to [AUTHRES] at some future time. Appendix B. Acknowledgements The author wishes to acknowledge the following for their review and constructive criticism of this proposal: S. Moonesamy, Scott Kitterman. Author's Address Murray S. Kucherawy Cloudmark, Inc. 128 King St., 2nd Floor San Francisco, CA 94107 US Phone: +1 415 946 3800 EMail: msk@cloudmark.com Kucherawy Expires August 15, 2012 [Page 5]