📧 Email Authentication Checker
One-click check of SPF, DKIM, and DMARC — comprehensive email security audit.
What is Email Authentication?
Email authentication uses DNS records to verify that emails actually come from the domains they claim to be from. The main standards are:
- SPF — Lists which servers can send email for your domain
- DKIM — Adds a digital signature to verify message integrity
- DMARC — Tells receivers what to do when SPF/DKIM fail
- MTA-STS — Enforces TLS encryption for mail delivery
- BIMI — Displays your brand logo in supporting email clients