Free DNS & Email Security Check

Check your domain's
DNS & email security

Instantly look up DNS records, verify SPF and DMARC configuration, and audit HTTP security headers for any domain. No account required.

A records MX records NS records TXT records SPF policy DMARC policy Security headers

Want continuous monitoring?

Secri Radar monitors your domains around the clock — detecting new subdomains, dangling DNS records, and takeover risks the moment they appear.

No credit card required · Free plan available