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DMARC policy
checker

Validate DMARC policies and analyze email authentication alignment. Check policy configuration and get insights for improved security.

Understanding DMARC authentication

DMARC (Domain-based Message Authentication, Reporting & Conformance) builds upon SPF and DKIM to provide domain owners with policy control over email authentication failures. It's essential for preventing email spoofing and improving deliverability.

DMARC implementation steps

1. Setup SPF and DKIM

Ensure proper SPF and DKIM authentication before implementing DMARC.

2. Start with p=none

Monitor email flows for 2-4 weeks to understand your ecosystem.

3. Analyze reports

Review aggregate reports to identify legitimate vs. fraudulent sources.

4. Enforce gradually

Move to quarantine, then reject policies using percentage controls.

DMARC policy levels

None (p=none)

Monitor mode - collect data without affecting email delivery.

Quarantine (p=quarantine)

Failed emails sent to spam folder for recipient review.

Reject (p=reject)

Maximum protection - unauthorized emails are blocked completely.

Need complete DMARC protection?

InboxKit provides automated DMARC setup with monitoring and expert guidance