DMARC Analyzer Tool
Analyze DMARC policies and improve email security
DMARC (Domain-based Message Authentication, Reporting & Conformance) builds on SPF and DKIM to provide comprehensive email authentication and reporting.
DMARC Policy Analysis
Enter a domain name to analyze its DMARC policy and get security recommendations
What is DMARC?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol that builds upon SPF and DKIM to provide comprehensive protection against email spoofing, phishing, and domain abuse.
How DMARC Works:
- You publish a DMARC policy in your DNS records
- When an email claiming to be from your domain is received, the recipient's mail server checks your DMARC policy
- The server verifies SPF and/or DKIM authentication
- It checks if the authenticated domain aligns with the "From" header domain
- Based on your policy, the email is delivered, quarantined, or rejected
- Reports are sent back to you about authentication results
DMARC Policy Options:
noneMonitor Only
No action taken, only collect reports
quarantineQuarantine
Mark suspicious emails as spam
rejectReject
Block unauthorized emails completely
Benefits of DMARC:
- Prevents domain spoofing and phishing attacks
- Improves email deliverability and sender reputation
- Provides visibility into email authentication failures
- Enables gradual policy enforcement with percentage controls
- Protects brand reputation and customer trust
- Required for many compliance frameworks
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