Free check
Audit any domain in 30 seconds.
We run SPF, DMARC, DKIM (8 common selectors), MTA-STS, and MX checks live from our own DNS. No login, no email gate, no upsell pop-up. Scored against Gmail and Yahoo's Nov-2025 rules.
Want the full diagnosis?
This public check probes 8 common DKIM selectors and five top-level indicators. The MCP server's email_auth_wizard tool runs 20+ checks including DKIM key-length, alignment mode, BIMI / VMC verification, policy rollback, and on-registrar fixes.