DomainKeys Identified Mail

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DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect email spoofing. It allows the receiver to check that an email claimed to come from a specific domain was indeed authorized by the owner of that domain.

It is intended to prevent forged sender addresses in emails, a technique often used in phishing and email spam.

Description

In technical terms, DKIM lets a domain associate its name with an email message by affixing a digital signature to it. Verification is carried out using the signer's public key published in the DNS. A valid signature guarantees that some parts of the email (possibly including attachments) have not been modified since the signature was affixed.

Usually, DKIM signatures are not visible to end-users, and are affixed or verified by the infrastructure rather than message's authors and recipients. In that respect, DKIM differs from end-to-end digital signatures.

See also

External links