Domain Health Check
A domain health check runs every critical check on your domain at once — SSL certificate, email blacklists, SPF, DKIM and DMARC, domain expiry, and DNS. This free tool scores your domain 0–100 and shows exactly what's healthy and what needs fixing, in one report.
All five checks · 0–100 score · free · no signup
Frequently asked questions
What is a domain health check?
A domain health check runs the checks that decide whether your website and email actually work and are trusted — TLS certificate, DNS blacklists, SPF/DKIM/DMARC email authentication, domain registration/expiry, and DNS records — and summarises them in one report with a score.
What does the health score mean?
The score is 0–100, weighted by impact: blacklist 30, SSL 25, email auth 25, registration 10, DNS 10. A pass earns full weight, a warning half, a failure zero. Advisory/collateral blacklist listings only shave a couple of points. Aim for 85+.
Which checks are included?
Five: SSL certificate (expiry, chain, hostname), email blacklists across 52 DNSBLs, email authentication (SPF lookups, DKIM, DMARC policy), domain registration (expiry and transfer lock), and a DNS snapshot (A/AAAA/MX/NS/TXT/CAA).
How often should I check my domain?
Ad-hoc checks are fine before a launch or migration, but certificates expire, blacklistings appear and DNS gets changed without warning. Continuous monitoring re-runs these checks automatically and alerts you the moment something breaks — before your customers notice.
Is it really free?
Yes — the instant report is free and needs no account. Continuous monitoring of one domain is free too; paid plans add faster check intervals, more domains and alert channels.