What is DMARC?

Domain-based Message Authentication, Reporting & Conformance, or DMARC, is an email authentication tool that prevents data spoofing, tampering, phishing, and cyberattacks.

DMARC authenticates if either SPF, DKIM, or both pass and decides how to handle the message if it fails authorization.

Not all receiving serves will do a DMARC analysis before obtaining the message, but all the major Internet service providers (ISP) do. 

Some benefits of implementing DMARC include warranting domain reputation and security, email reliability, preventing email fraud, ensuring compliance, and more.

A DMARC record is a record published in DNS (Domain Name System) that informs email servers how to operate with unauthenticated emails and where to report email authentication statistics.

All major email service providers support DMARC, including Gmail, Outlook, Yahoo, Apple Mail, and AOL.