Free tool

Email health check

Type your email address or domain. In about 15 seconds you see whether other mail servers can trust your email: SPF, DKIM, DMARC, mail server records, MTA-STS, TLS reports and DNSSEC.

The check reads only public DNS records and the public MTA-STS file; it sends no email and stores nothing. It is general information, not a security audit or professional advice.