DMARC Checker Guide
Plan DMARC monitoring and enforcement with plain-English explanations for p=none, p=quarantine, and p=reject.
What DMARC adds
DMARC tells receiving systems how to handle messages that fail authentication. It also helps domain owners collect reports and move toward stronger enforcement.
- p=none is useful for monitoring.
- p=quarantine sends suspicious mail to spam or review.
- p=reject is the strongest enforcement policy.