DNS, email & HTTPS security
Check your website’s security
DNSSEC, zone transfer, CAA, SPF, DKIM, DMARC, MTA-STS, TLS certificate, HSTS, security headers and domain expiry.
The check takes 5 to 20 seconds: name servers, certificate and registry are queried directly.
DNS servers
Delegation, authority, SOA sync, zone transfer (AXFR), DNSSEC, CAA, wildcard, dangling CNAMEs.
Email security
SPF (and the 10-lookup limit), DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, MX.
HTTPS & headers
Certificate, expiry, TLS version, HTTPS redirect, HSTS, CSP, clickjacking.
Domain
Expiry, transfer lock and registrar via RDAP.
Passive, non-intrusive tests · DNS-over-HTTPS, RDAP · 30-minute cache
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