Email authentication
SPF, DKIM and DMARC checker
Check whether a domain’s email is set up so mail is delivered and cannot easily be faked: MX, SPF with lookup counting, DMARC, DKIM, MTA-STS, TLS-RPT and BIMI. Run it when mail lands in spam or bounces.
We check from the outside, the way visitors see your site, and keep a simple log of sites checked. Privacy policy.
How it works
What this checks
- Mail servers (MX) Where mail for the domain is delivered, and which provider runs those servers.
- SPF The record that lists who may send as the domain, with every include followed and the 10 DNS lookup limit counted.
- DMARC Whether a policy exists, what it tells receivers to do with mail that fails, and where reports are sent.
- DKIM Signing keys found at common selectors, or at the selector you enter under Options.
- Transport security MTA-STS and TLS-RPT, which make other servers deliver to you over a verified, encrypted connection. BIMI is reported as well.