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Email authentication

DKIM

A comprehensive collection of questions and answers about DKIM email authentication from email marketers, experts and technical documentation.

What DNS record type is used for DKIM?

What does the DKIM 's=' tag represent?

Is 'relaxed' or 'simple' canonicalization more strict in DKIM?

What DKIM tag indicates the algorithm used for signing?

What is the maximum recommended key length for DKIM?

Does DKIM sign the email body or just the headers?

What DKIM tag specifies the domain signing the email?

Can a single DKIM private key be used for multiple selectors?

What is the DKIM 'h=' tag used for?

Does DKIM ensure email privacy?

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