What is SPF?
In order to combat these two problems, global frameworks were created to combat email fraud. The first of these frameworks was called a Sender Policy Framework (SPF).
What is DKIM?
DKIM is the acronym for “DomainKeys Identified Mail“. It’s an email authentication framework whose major intent is to allow a receiving server to validate that the mail they received was the one that was originally sent.
Why do we need DMARC?
A policy called DMARC was designed to sit on top of both SPF and DKIM. Because it’s a policy that a domain owner publishes, it puts the control of what the receiver must do with a particular mail in the domain owner’s hands.
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