Free · No signup · 19 checks in one scan
Domain Health Checker
One scan, your whole domain. Domain Doctor checks DNS, email authentication, SSL, security headers, blacklists, hosting and speed — then scores your domain and shows you exactly what to fix.
VASTROX HOSTING · EMAIL · DNS · SSL
Want VASTROX to fix every issue above — for you?
Don't fix it alone. Our team configures your SPF, DKIM, DMARC, SSL, DNS and security headers correctly, then hosts you on fast NVMe infrastructure so your domain scores an A and stays there.
- Every failing check fixed and verified
- Hosting, business email, DNS & SSL under one roof
- Free migration from your current provider
What this checks
Your domain is more than a website. It is DNS records, mail servers, TLS certificates, and a reputation that decides whether your email reaches the inbox or the spam folder. A single misconfiguration — a missing DMARC record, an expiring certificate, an open port — can cost you customers, deliverability, and trust.
Domain Doctor runs 19 checks in one pass and grades your domain from A+ to F. Email security carries the most weight, because it is where most domains fail: current 2026 data shows roughly 68.8% of domains have no effective DMARC protection, leaving them wide open to spoofing and phishing.
Every result is explained in plain language with the exact record we found and a concrete fix. When you want it handled for you, VASTROX can configure DNS, email authentication, SSL and hosting end to end.
Common Domain Health Checker errors
- No DMARC record — anyone can spoof email from your domain
- SPF ends in +all or exceeds the 10-DNS-lookup limit
- SSL certificate expiring within 30 days
- Missing HSTS or Content-Security-Policy headers
- Sending IP listed on a spam blacklist
VASTROX HOSTING, EMAIL & DNS
Want VASTROX to fix everything it finds?
One team for your hosting, email authentication, DNS and SSL — configured correctly and monitored, so your domain scores an A and stays there.
- Hosting, email, DNS & SSL under one roof
- Every issue above fixed for you
- Free migration and expert support
Trusted by businesses for hosting, VPS, business email & game servers · Free migration · Real support
Frequently asked questions
Is the domain health checker free?
Yes. Every scan is free, needs no signup, and returns results in seconds. You can check as many domains as you like.
What does the score mean?
We combine 19 checks into a 0–100 score and an A+ to F grade. Email authentication, SSL and reachability carry the most weight because they have the biggest impact on security and deliverability.
Do you store my results?
We briefly cache a report so a repeat scan of the same domain is instant, then it expires. We do not require an account or keep a history tied to you.
Can VASTROX fix the issues it finds?
Yes. VASTROX provides hosting, email, DNS and SSL services and can configure SPF, DKIM, DMARC, MTA-STS, certificates and security headers for you.
Powered by VASTROX
Domain Doctor is free. When you're ready to fix what it finds — or move to a host that gets it right by default — VASTROX has you covered.