Free Tool
Domain Security Checker
Comprehensive email security analysis with 15+ checks. Get an instant grade and actionable recommendations.
15+ Security Checks Including
DMARC
SPF
DKIM
MTA-STS
BIMI
TLS-RPT
MX
DNSSEC
Blacklist
IPv6
+5 more
Free forever. No signup required.
What We Check
DMARC
Policy, reporting, and alignment settings
SPF
Authorized senders and policy enforcement
DKIM
Signature verification with common selectors
MTA-STS
Transport security policy for inbound mail
MX Records
Mail server configuration and health
DNSSEC
DNS Security Extensions validation
Want continuous monitoring?
A one-time check is a good start. DDMARC provides continuous monitoring, automated alerts, and guided remediation to keep your domain secure.