Extensions to DomainKeys Identified Mail (DKIM) for Failure Reporting
RFC 6651
Internet Engineering Task Force (IETF) M. Kucherawy
Request for Comments: 6651 Cloudmark
Category: Standards Track June 2012
ISSN: 2070-1721
Extensions to DomainKeys Identified Mail (DKIM) for Failure Reporting
Abstract
This document presents extensions to the DomainKeys Identified Mail
(DKIM) specification to allow for detailed reporting of message
authentication failures in an on-demand fashion.
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/rfc6651.
Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Kucherawy Standards Track [Page 1]
RFC 6651 DKIM Reporting Extensions June 2012
Table of Contents
1. Introduction ....................................................3
2. Definitions .....................................................3
2.1. Key Words ..................................................3
2.2. Notation ...................................................3
2.3. Imported Definitions .......................................3
2.4. Other Definitions ..........................................3
3. Optional Reporting for DKIM .....................................4
3.1. Extension DKIM Signature Tag ...............................4
3.2. DKIM Reporting TXT Record ..................................4
3.3. DKIM Reporting Algorithm ...................................6
4. Optional Reporting Address for DKIM ADSP ........................8
5. Requested Reports ...............................................9
5.1. Requested Reports for DKIM Failures .......................10
5.2. Requested Reports for DKIM ADSP Failures ..................10
6. Report Generation ..............................................11
6.1. Report Format .............................................11
6.2. Other Guidance ............................................11
7. IANA Considerations ............................................11
7.1. DKIM Signature Tag Registration ...........................11
7.2. DKIM ADSP Tag Registration ................................12
7.3. DKIM Reporting Tag Registry ...............................12
8. Security Considerations ........................................13
8.1. Inherited Considerations ..................................13
8.2. Report Volume .............................................13
8.3. Deliberate Misuse .........................................13
8.4. Unreported Fraud ..........................................14
9. References .....................................................14
9.1. Normative References ......................................14
9.2. Informative References ....................................15
Appendix A. Acknowledgements ......................................16
Appendix B. Examples ..............................................16
B.1. Example Use of DKIM Signature Extension Tag ...............16
B.2. Example DKIM Reporting TXT Record .........................17
B.3. Example Use of DKIM ADSP Extension Tags ...................17
Kucherawy Standards Track [Page 2]
RFC 6651 DKIM Reporting Extensions June 2012
1. Introduction
DomainKeys Identified Mail [DKIM] introduced a mechanism for message
signing and authentication. It uses digital signing to associate a
domain name with a message in a reliable manner. The verified domain
name can then be evaluated (e.g., checking advertised sender policy,
comparison to a known-good list, submission to a reputation service,
etc.).
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