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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