Free Tool

DMARC Policy Impact Simulator

Simulate the effect of stricter DMARC policies on your email traffic. Upload a DMARC XML report and see the impact.

Upload DMARC XML Report

Your DMARC XML report is processed locally and never uploaded to a server.

Frequently Asked Questions

Common questions about DMARC policy simulation

What is a DMARC policy impact simulator?

A tool that shows how changing your DMARC policy affects email delivery. Upload aggregate reports, select a policy, and see which emails would be quarantined or rejected. Prevents blocking legitimate email.

Should I use p=quarantine or p=reject?

Start with p=none (monitor). After 2-4 weeks, move to p=quarantine (spam). Once all legitimate sources pass, use p=reject (block) for maximum protection. Simulate impact before changing.

How long should I monitor before changing policy?

Monitor at p=none for 2-4 weeks minimum to capture all sending patterns. Ensure all legitimate senders pass SPF/DKIM. Monitor p=quarantine for another 2-4 weeks before p=reject.

Help & Resources

DMARC Policy Impact Simulator

Simulate the effect of stricter DMARC policies on your email traffic. Upload a DMARC XML report and see how policy changes would impact delivery.

How it works

  • Upload a DMARC XML report or use sample data
  • View instant analysis with default p=none policy
  • Switch between policies to see impact changes
  • Get actionable recommendations

Best Practices

  • Start with p=none to monitor
  • Gradually move to quarantine or reject
  • Review sources that would be affected

Need more help? Check out our documentation or contact support.