A free tool to 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 digests, absolutely free.

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

Need help?

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