A free weekly email to help monitor & implement DMARC

DMARC is a standard that prevents spammers from using your domain to send email without your permission — also known as spoofing. Learn why DMARC is important.

We will process reports from major ISPs about your domain's DMARC alignment and turn them into beautiful, human-readable weekly email summaries, absolutely free.

This service is provided for free from Postmark — an email service for web apps.

Need help?

Check out the FAQ page for immediate solutions to common problems. Bespoke support for our free tool is available to Postmark customers.

Try our new premium DMARC monitoring ✨

Protect your brand from email scammers with more visibility into who’s sending emails using your domains.

  • Visibility into all mail sources and origin IPs
  • 60 days of DMARC report history
  • Intuitive web dashboard for viewing reports
  • Actionable recommendations
  • Weekly and monthly email digests
Start a free 14-day trial Learn more

Visibility Into Mail Sources

Find out who’s sending emails using your domains and the IPs those emails originate from.

DMARC Report History

View DMARC alignment for your domains over time.

Web Dashboard

Manage all your domains, view statistics, and inspect mail sources from a single, intuitive web dashboard.

Actionable Recommendations

Learn how to improve DMARC alignment for trusted mail sources.

Email Digests

View DMARC alignment for your domains over time.

Free Monitoring

Great for monitoring personal domains.

Top 10 mail sources
with 5 IPs for each source
7 Days
Email only


weekly email reports

Get started

✨ Premium Monitoring ✨

The best tool for protecting your brand from spoofing and phishing attacks.

All mail sources and IPs
60 Days
Web Dashboard & Email
Weekly & Monthly


a month per domain

Start a free 14-day trial

Cancel anytime. No fuss. No hassle.