About DomainCanary

DomainCanary is a DMARC monitoring service that turns your domain's aggregate reports into one weekly email.

Mailbox providers such as Google, Microsoft and Yahoo write daily XML reports about every server sending mail as your domain. Point your domain's DMARC record at an address we run and we collect those reports, parse them, and send you one email each Monday: the senders using your domain, whether each one passes authentication, and the one change worth making next. The free plan covers your first domain; what the paid plans add is on the pricing page.

The site also carries eight free tools that need no account, among them checkers for DMARC, SPF and DKIM, and guides that walk the whole policy ramp from p=none to p=reject.

Who runs it

DomainCanary is operated by Final Dynamics LLC, doing business as DomainCanary. The open-source side of the project lives at github.com/domaincanary, which is also the place to file an issue.