Domain Keys Identified Mail
DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message. The association is set up by means of a digital signature which can be validated by recipients. Responsibility is claimed by a signer —independently of the message's actual authors or recipients— by adding a DKIM-Signature: field to the message's header. The verifier recovers the signer's public key using the DNS, and then verifies that the signature matches the actual message's content.
A DKIM signature can cover other fields of a message's header, such as the From: and Subject: fields, and the message body (or its initial part). The DKIM-Signature field itself is always implicitly covered, and, besides the signature proper, contains other data identified by tags, such as the domain name, the list of covered fields, the signing algorithm, and the method by which text snippets are simplified for signing purposes (canonicalization). Thus, the strength of a DKIM-Signature can be tuned so as to allow those message modifications that are considered "normal". Note that DKIM is not designed to provide end-to-end integrity.
Prominent email service providers implementing DKIM include Yahoo, Gmail, and AOL. Any mail from these organizations should carry a DKIM signature.
DKIM, as stated on the DKIM homepage, is the result of merging DomainKeys and Identified Internet Mail. This merged specification has been the basis for a series of IETF standards-track specifications and support documents.
Read more about Domain Keys Identified Mail: Overview, Advantages, Weaknesses
Famous quotes containing the words domain, keys, identified and/or mail:
“You are the harvest and not the reaper
And of your domain another is the keeper.”
—John Ashbery (b. 1927)
“And yet we constantly reclaim some part of that primal spontaneity through the youngest among us, not only through their sorrow and anger but simply through everyday discoveries, life unwrapped. To see a child touch the piano keys for the first time, to watch a small body slice through the surface of the water in a clean dive, is to experience the shock, not of the new, but of the familiar revisited as though it were strange and wonderful.”
—Anna Quindlen (b. 1952)
“Linguistically, and hence conceptually, the things in sharpest focus are the things that are public enough to be talked of publicly, common and conspicuous enough to be talked of often, and near enough to sense to be quickly identified and learned by name; it is to these that words apply first and foremost.”
—Willard Van Orman Quine (b. 1908)
“We grew up founding our dreams on the infinite promise of American advertising. I still believe that one can learn to play the piano by mail and that mud will give you a perfect complexion.”
—Zelda Fitzgerald (1900–1948)