DomainKeys Identified Mail (DKIM) and Mailing Lists
RFC 6377
| Document | Type |
RFC - Best Current Practice
(September 2011; Errata)
Also known as BCP 167
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-kucherawy-dkim-lists | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | Barry Leiba | ||
| IESG | IESG state | RFC 6377 (Best Current Practice) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Sean Turner | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) M. Kucherawy
Request for Comments: 6377 Cloudmark
BCP: 167 September 2011
Category: Best Current Practice
ISSN: 2070-1721
DomainKeys Identified Mail (DKIM) and Mailing Lists
Abstract
DomainKeys Identified Mail (DKIM) allows an ADministrative Management
Domain (ADMD) to assume some responsibility for a message. Based on
deployment experience with DKIM, this document provides guidance for
the use of DKIM with scenarios that include Mailing List Managers
(MLMs).
Status of This Memo
This memo documents an Internet Best Current Practice.
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
BCPs 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/rfc6377.
Copyright Notice
Copyright (c) 2011 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.
Kucherawy Best Current Practice [Page 1]
RFC 6377 DKIM and Mailing Lists September 2011
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Background . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. MLMs in Infrastructure . . . . . . . . . . . . . . . . . . 4
1.3. Feedback Loops and Other Bilateral Agreements . . . . . . 5
1.4. Document Scope and Goals . . . . . . . . . . . . . . . . . 6
2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1. Key Words . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2. Messaging Terms . . . . . . . . . . . . . . . . . . . . . 6
2.3. DKIM-Specific References . . . . . . . . . . . . . . . . . 6
2.4. 'DKIM-Friendly' . . . . . . . . . . . . . . . . . . . . . 7
2.5. Message Streams . . . . . . . . . . . . . . . . . . . . . 7
3. Mailing Lists and DKIM . . . . . . . . . . . . . . . . . . . . 7
3.1. Roles and Realities . . . . . . . . . . . . . . . . . . . 7
3.2. Types of Mailing Lists . . . . . . . . . . . . . . . . . . 8
3.3. Current MLM Effects on Signatures . . . . . . . . . . . . 10
4. Non-Participating MLMs . . . . . . . . . . . . . . . . . . . . 11
4.1. Author-Related Signing . . . . . . . . . . . . . . . . . . 12
4.2. Verification Outcomes at Receivers . . . . . . . . . . . . 12
4.3. Handling Choices at Receivers . . . . . . . . . . . . . . 13
4.4. Wrapping a Non-Participating MLM . . . . . . . . . . . . . 13
5. Participating MLMs . . . . . . . . . . . . . . . . . . . . . . 13
5.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2. DKIM Author Domain Signing Practices . . . . . . . . . . . 14
5.3. Subscriptions . . . . . . . . . . . . . . . . . . . . . . 15
5.4. Exceptions to ADSP Recommendations . . . . . . . . . . . . 15
5.5. Author-Related Signing . . . . . . . . . . . . . . . . . . 16
5.6. Verification Outcomes at MLMs . . . . . . . . . . . . . . 16
5.7. Signature Removal Issues . . . . . . . . . . . . . . . . . 17
5.8. MLM Signatures . . . . . . . . . . . . . . . . . . . . . . 19
5.9. Verification Outcomes at Final Receiving Sites . . . . . . 20
5.10. Use with FBLs . . . . . . . . . . . . . . . . . . . . . . 20
5.11. Handling Choices at Receivers . . . . . . . . . . . . . . 21
6. DKIM Reporting . . . . . . . . . . . . . . . . . . . . . . . . 22
7. Security Considerations . . . . . . . . . . . . . . . . . . . 22
7.1. Security Considerations from DKIM and ADSP . . . . . . . . 22
7.2. Authentication Results When Relaying . . . . . . . . . . . 23
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.1. Normative References . . . . . . . . . . . . . . . . . . . 23
8.2. Informative References . . . . . . . . . . . . . . . . . . 23
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 25
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