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DMARC Checker
Inspect your DMARC record and enforcement policy. DMARC ties together SPF and DKIM to tell receiving servers exactly what to do with emails that fail authentication.
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What is DMARC?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is the final layer of email authentication. It tells receiving mail servers what to do when an email fails SPF or DKIM checks — nothing (p=none), quarantine it (p=quarantine), or reject it entirely (p=reject).
Without DMARC, even if you have SPF and DKIM configured, attackers can still send spoofed emails that pass through to inboxes. The path to full protection is: p=none → p=quarantine → p=reject.