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DMARC Record Checker

Check and analyze DMARC (Domain-based Message Authentication, Reporting & Conformance) records for any domain. This tool validates DMARC syntax, explains each tag, and provides security recommendations.

What this tool checks:

  • DMARC Record Validation - Verifies that the DMARC record syntax is correct and follows RFC 7489 standards
  • Policy Analysis - Examines the domain policy (p=) and subdomain policy (sp=) to determine protection level
  • Reporting Configuration - Checks if aggregate (rua) and forensic (ruf) reporting URIs are configured
  • Alignment Modes - Analyzes SPF and DKIM alignment settings (aspf, adkim) for strict or relaxed matching
  • Security Recommendations - Provides actionable recommendations to improve your DMARC configuration

Why DMARC matters:

DMARC works with SPF and DKIM to provide the most complete email authentication solution available. It prevents phishing attacks, protects your brand reputation, and is now required by major email providers like Gmail and Yahoo for bulk email senders.

Common deployment strategy:

  1. Start with p=none to monitor authentication without affecting email delivery
  2. Analyze DMARC reports to identify legitimate email sources
  3. Fix any SPF/DKIM issues found in reports
  4. Gradually increase to p=quarantine, then p=reject for maximum protection

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