Public signal checker
DNS and Email Signal Checker
This checker summarizes the DNS records that SiteTraceKit can read from public resolvers and highlights email-authentication signals.
The check uses public live signals and does not make a security, malware, fraud or legal verdict.
Run a public signal check
- HTTP
- DNS
- TLS
- RDAP
- Archive
What this checker analyzes
- A and AAAA records for public website resolution.
- NS, MX, TXT and CAA records where available.
- SPF and DMARC records that help email receivers evaluate domain mail.
Why it matters
- DNS issues can break websites, email delivery and certificate issuance.
- SPF and DMARC can reduce spoofing confusion when a domain sends email.
What the results mean
- Found records are displayed as live public DNS answers.
- Missing SPF or DMARC is a review signal, especially when the domain sends email.
- Unavailable means the resolver or record type did not return usable data.
Limits of this check
- DNS is live and can change quickly.
- The checker does not decide whether an email policy is optimal for every sending setup.
- Private DNS and split-horizon DNS are outside the scope.
What should also be reviewed manually?
Review notable values in the context of the actual website, its subpages and connected services. A homepage check cannot prove the complete configuration, legal position or security posture.
FAQ
Does every domain need MX records?
Not always. A domain that never receives email may not need MX records, but the decision should be intentional.