Email Authentication Status Codes
draft-ietf-appsawg-email-auth-codes-00

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Last updated 2014-05-25
Replaces draft-kucherawy-email-auth-codes
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Network Working Group                                       M. Kucherawy
Internet-Draft                                              May 23, 2014
Intended status: Informational
Expires: November 24, 2014

                   Email Authentication Status Codes
                 draft-ietf-appsawg-email-auth-codes-00

Abstract

   There is at present no way to return a status code to an email client
   that indicates a message is being rejected or deferred specifically
   because of email authentication failures.  This document registers
   codes for this purpose.

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
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   This Internet-Draft will expire on November 24, 2014.

Copyright Notice

   Copyright (c) 2014 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  New Status Codes  . . . . . . . . . . . . . . . . . . . . . . . 3
     2.1.  DKIM Failures Code  . . . . . . . . . . . . . . . . . . . . 3
     2.2.  SPF Failures Code . . . . . . . . . . . . . . . . . . . . . 4
     2.3.  Reverse DNS Failure Code  . . . . . . . . . . . . . . . . . 4
   3.  General Considerations  . . . . . . . . . . . . . . . . . . . . 4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   6.  Normative References  . . . . . . . . . . . . . . . . . . . . . 5
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . . . 5

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1.  Introduction

   [RFC3463] introduced Enhanced Mail System Status Codes, and [RFC5248]
   created an IANA registry for these.

   [RFC6376] and [RFC7208] introduced, respectively, DomainKeys
   Identified Mail and Sender Policy Framework, two protocols for
   conducting email authentication.  Another common email acceptance
   test is the reverse Domain Name System check on an email client's IP
   address, as described in Section 3 of [RFC7001].

   The current set of enhanced status codes does not include any code
   for indicating that a message is being rejected or deferred due to
   local policy reasons related to either of these two mechanisms.  This
   document introduces enhanced status codes for reporting those cases
   to clients.

2.  New Status Codes

   The following new status codes are defined:

2.1.  DKIM Failures Code

      Code:               X.7.19
      Sample Text:        No valid DKIM signature found
      Associated basic status code:  5
      Description:        This status code is returned when a message
                          did not contain a valid DKIM signature,
                          contrary to local policy requirements.
      Reference:          [this document]
      Submitter:          M. Kucherawy
      Change controller:  IESG

      Code:               X.7.20
      Sample Text:        No valid author DKIM signature found
      Associated basic status code:  5
      Description:        This status code is returned when a message
                          did not contain a valid DKIM signature
                          matching the domain(s) found in the From
                          header field, contrary to local policy
                          requirements.
      Reference:          [this document]
      Submitter:          M. Kucherawy
      Change controller:  IESG

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