DMARC Record Validator
Parses your DMARC record and flags syntax issues, missing required directives, and policy-misconfiguration risks.
Validates v=DMARC1 prefix, p= directive (none/quarantine/reject), optional pct (1-100), rua and ruf reporting addresses (valid email format), optional sp subdomain policy, alignment modes (aspf, adkim).
After updating DMARC, before publishing. Before tightening from p=none to p=quarantine or p=reject.
FAQ
What does pct= mean?+
Percentage of messages the policy applies to. p=quarantine pct=10 means only 10% of failing messages get quarantined. Useful for gradual rollout.
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Articles, glossary entries, and other tools on the same topic.
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We update these pages when the underlying mechanics change — new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.