DomainKeys Identified Mail (DKIM) Development, Deployment, and Operations
RFC 5863
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RFC - Informational
(May 2010; No errata)
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2015-10-14
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IETF
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plain text
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IESG state |
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RFC 5863 (Informational)
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Consensus Boilerplate |
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Unknown
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Responsible AD |
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Pasi Eronen
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Send notices to |
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stephen.farrell@cs.tcd.ie
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Internet Engineering Task Force (IETF) T. Hansen
Request for Comments: 5863 AT&T Laboratories
Category: Informational E. Siegel
ISSN: 2070-1721 Consultant
P. Hallam-Baker
Default Deny Security, Inc.
D. Crocker
Brandenburg InternetWorking
May 2010
DomainKeys Identified Mail (DKIM)
Development, Deployment, and Operations
Abstract
DomainKeys Identified Mail (DKIM) allows an organization to claim
responsibility for transmitting a message, in a way that can be
validated by a recipient. The organization can be the author's, the
originating sending site, an intermediary, or one of their agents. A
message can contain multiple signatures, from the same or different
organizations involved with the message. DKIM defines a domain-level
digital signature authentication framework for email, using public
key cryptography and using the domain name service as its key server
technology. This permits verification of a responsible organization,
as well as the integrity of the message content. DKIM will also
provide a mechanism that permits potential email signers to publish
information about their email signing practices; this will permit
email receivers to make additional assessments about messages.
DKIM's authentication of email identity can assist in the global
control of "spam" and "phishing". This document provides
implementation, deployment, operational, and migration considerations
for DKIM.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Hansen, et al. Informational [Page 1]
RFC 5863 DKIM Development/Deployment/Operations May 2010
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/rfc5863.
Copyright Notice
Copyright (c) 2010 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.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction ....................................................4
2. Using DKIM as Part of Trust Assessment ..........................4
2.1. A Systems View of Email Trust Assessment ...................4
2.2. Choosing a DKIM Tag for the Assessment Identifier ..........6
2.3. Choosing the Signing Domain Name ...........................8
2.4. Recipient-Based Assessments ...............................10
2.5. Filtering .................................................12
3. DKIM Key Generation, Storage, and Management ...................15
3.1. Private Key Management: Deployment and Ongoing
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