What is authentication?

Authentication is the process of attempting to verify the digital identity of a sender. In email marketing, there are three main types of authentication:

  • DomainKeys Identified Mail (DKIM)
  • Sender Policy Framework (SPF)
  • Domain-based Message Authentication, Reporting, and Conformance (DMARC)

SPF and DKIM are the most widely used and accepted forms of email authentication.


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