DMARC Analyzer Tool

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:

1. You publish a DMARC policy in your DNS records
2. When an email claiming to be from your domain is received, the recipient's mail server checks your DMARC policy
3. The server verifies SPF and/or DKIM authentication
4. It checks if the authenticated domain aligns with the "From" header domain
5. Based on your policy, the email is delivered, quarantined, or rejected
6. Reports are sent back to you about authentication results

DMARC Policy Options:

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