Sender Policy Framework (SPF) Authentication Failure Reporting Using the Abuse Reporting Format
RFC 6652

Internet Engineering Task Force (IETF)                      S. Kitterman
Request for Comments: 6652                                         Agari
Updates: 4408                                                  June 2012
Category: Standards Track
ISSN: 2070-1721

     Sender Policy Framework (SPF) Authentication Failure Reporting
                    Using the Abuse Reporting Format

Abstract

   This memo presents extensions to the Abuse Reporting Format (ARF) and
   Sender Policy Framework (SPF) specifications to allow for detailed
   reporting of message authentication failures in an on-demand fashion.

   This memo updates RFC 4408 by providing an IANA registry for SPF
   modifiers.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc6652.

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.

Kitterman                    Standards Track                    [Page 1]
RFC 6652               SPF Auth Failure Reporting              June 2012

Table of Contents

   1. Introduction ....................................................2
   2. Definitions .....................................................3
      2.1. Key Words ..................................................3
      2.2. Imported Definitions .......................................3
   3. Optional Reporting Address for SPF ..............................3
   4. Requested Reports ...............................................4
      4.1. Requested Reports for SPF Failures .........................5
   5. IANA Considerations .............................................5
      5.1. SPF Modifier Registration ..................................5
   6. Security Considerations .........................................6
      6.1. Identity Selection .........................................6
      6.2. Report Volume ..............................................6
   7. References ......................................................7
      7.1. Normative References .......................................7
      7.2. Informative References .....................................7
   Appendix A. Acknowledgements .......................................8
   Appendix B. Examples ...............................................8
      B.1. SPF DNS Record for Domain That Sends No Mail but
           Requests Reports ...........................................8
      B.2. Minimal SPF DNS Record Change to Add a Reporting
           Address ....................................................8
      B.3. SPF DNS Record with Reporting Address, Report
           Percentage, and Requested Report Type ......................8

1.  Introduction

   The Abuse Reporting Format [ARF] defines a message format for sending
   reports of abuse in the messaging infrastructure, with an eye toward
   automating both the generation and consumption of those reports.

   The Sender Policy Framework [SPF] is one mechanism for message sender
   authentication; it is "path-based", meaning it authenticates the
   route that a message took from origin to destination.  The output is
   a verified domain name that can then be subjected to some sort of
   evaluation process (e.g., comparison to a known-good list, submission
   to a reputation service, etc.).

   This document extends [SPF] to add an optional reporting address and
   other parameters.  Extension of [ARF] to add features required for
   the reporting of these incidents is covered in [ARF-AUTHFAIL] and
   [ARF-AS].

   This document additionally creates a an IANA registry of [SPF] record
   modifiers to avoid modifier namespace collisions.

Kitterman                    Standards Track                    [Page 2]