Free DNS Security Tool
Check whether your business domain and DNS records show the signs of a clean, security-aware setup.
Enter your business domain to review nameservers, DNSSEC, CAA, MX, SPF, and DMARC. This DNS health checker is designed to help business owners, Microsoft 365 admins, and IT teams understand whether their domain security posture looks organized, intentional, and ready for stronger email protection.
Run the Tool
What this domain security checker looks for
A strong business domain setup depends on more than a website loading properly. This tool reviews the DNS records that often matter most for email security, certificate governance, and overall domain hygiene so you can spot whether the setup looks deliberate or incomplete.
Domain Security Score
Run the tool to see your results.
When a result is ready, you’ll see your score or risk level, plain-English findings, and the next actions worth prioritizing.
How To Use This Result Safely
Helpful guidance, not a final security or legal conclusion.
This tool uses public records, safe response metadata, or the answers you provide. It does not perform intrusive testing or exploit scanning.
- Use this result as educational guidance and a discussion starter, not as a penetration test, exploit scan, or final security verdict.
- Do not treat the result as legal, compliance, insurance, or regulatory advice.
- Important decisions should still be validated through a professional review of your real environment, vendors, and business requirements.
What this domain security checker looks for
A strong business domain setup depends on more than a website loading properly. This tool reviews the DNS records that often matter most for email security, certificate governance, and overall domain hygiene so you can spot whether the setup looks deliberate or incomplete.
- Nameservers and mail-related DNS records that influence ownership clarity and service routing
- DNSSEC presence when it can be detected publicly
- CAA record presence to help control certificate issuance
- SPF and DMARC posture for business email authentication and spoofing protection
Why domain security and DNS health matter
Your domain is a business identity asset. Weak DNS structure, incomplete email authentication, or unclear certificate governance can make email impersonation easier, create support confusion, and leave important services more fragile than they need to be. A cleaner DNS posture supports stronger email security, better ownership visibility, and more reliable operations.
Professional Review
Want a professional review of your results?
If your DNS posture looks incomplete, Red Shield IT can help review registrar access, DNS structure, mail security records, and certificate governance.
What a consultation can help clarify
- Whether the result reflects a configuration gap, an operational gap, or both
- Which issues should be prioritized first for security or business impact
- What a realistic remediation plan looks like for your environment
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Open ToolFAQ
Common questions about Domain Security & DNS Health Checker.
What does a DNS health checker actually tell me?
It shows whether the public DNS records tied to your business domain look complete and security-aware. That includes nameservers, email-related records, and certificate-governance signals such as CAA and DNSSEC.
Does this prove my DNS is fully secure?
No. It provides a public-record posture check, not a full review of registrar access, DNS provider controls, change management, MFA on the registrar, or internal governance.
Why do SPF and DMARC matter in a domain security checker?
Because domain security is closely tied to email identity. If SPF or DMARC is missing or weak, other parties may find it easier to impersonate your domain in phishing or invoice-fraud attempts.
What does CAA help with?
CAA records help specify which certificate authorities are allowed to issue certificates for your domain, which can improve control over certificate issuance and reduce ambiguity.
Is DNSSEC required for every business domain?
Not every environment treats DNSSEC the same way, but it is still a valuable signal to review when thinking about domain integrity, DNS trust, and long-term security maturity.