DMARC Checker

Verify and parse a domain's DMARC record. See policy, reports, alignment, and common issues.

About DMARC

DMARC helps protect your domain from spoofing by aligning SPF and DKIM and providing reporting. This checker fetches the TXT record at _dmarc.yourdomain, parses its tags, and highlights common issues.

DMARC lets domain owners publish a policy (p=) that tells receivers how to handle messages that fail SPF/DKIM alignment and where to send reports. It increases trust, reduces phishing, and gives visibility into who is sending mail on your behalf.

  • Visibility with aggregate reports via rua= (and optional forensic reports via ruf=).
  • Safe rollout using pct= to phase enforcement and sp= for subdomain policy.
  • Stronger protection with strict alignment (adkim=s, aspf=s).
  • Helps meet requirements from major mailbox providers and improves deliverability.

Recommended approach: start with p=none to collect reports and fix legitimate sources until SPF or DKIM passes. Then move to p=quarantine and finally p=reject, optionally ramping with pct=. Ensure your rua= address is monitored (or use a reporting service).

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