Definition
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication policy that builds on SPF and DKIM. It tells receiving servers what to do when an email fails authentication: none (just monitor), quarantine (send to spam), or reject (block entirely). DMARC also enables reporting, so you receive feedback about who is sending email using your domain. Implementing DMARC is essential for protecting your domain from spoofing and phishing attacks.
Related Topics
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