Email Authentication Status Codes
draft-ietf-appsawg-email-auth-codes-00
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
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This Internet-Draft will expire on November 24, 2014.
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Internet-Draft Email Auth Status Codes May 2014
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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Internet-Draft Email Auth Status Codes May 2014
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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