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DMARC Checker

Enter a domain to look up its DMARC policy and see what it actually tells receiving mail servers to do, in plain English.

What is DMARC?

DMARC ties SPF and DKIM together and tells receiving servers what to do with a message that fails both — and can send you reports showing who's sending mail using your domain. See our full SPF, DKIM & DMARC explainer.

Changing your DMARC policy to quarantine or reject before confirming all legitimate senders pass SPF/DKIM can cause real mail to be blocked. Start at none, review the reports, then tighten gradually.