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DMARC (Domain-based Message Authentication, Reporting & Conformance) is the email authentication protocol that tells receiving mail servers what to do when SPF or DKIM checks fail. It prevents email spoofing, protects your brand, and is now required by Google and Yahoo for bulk senders. Use our free tools, follow our guides, and read our articles to get DMARC right.
Check your domain's DMARC policy, alignment mode, and reporting configuration in seconds.
Generate a valid DMARC TXT record with the right policy, reporting addresses, and alignment settings.
Learn what DMARC does, how it works with SPF and DKIM, and why every domain needs it.
Understand the three pillars of email authentication and how they work together to protect your domain.
Google and Yahoo now require DMARC for bulk senders. Learn about the latest requirements and how to comply.
A comprehensive guide to implementing SPF, DKIM, and DMARC correctly for maximum deliverability.
Step-by-step walkthrough of generating a DMARC record with the right policy and reporting settings.
Learn how attackers spoof email addresses and the authentication controls that stop them.