DNS &
Email Security Scanner
Scan DNS, email authentication, blacklists, and debug real emails — with AI-assisted explanations. Free API available.
Everything you need for DNS security
Comprehensive analysis tools to ensure your domain is secure and properly configured
DNS Analysis
In-depth analysis of DNS configuration and optimization suggestions
- A, AAAA, MX, TXT records
- DNS propagation monitoring
- TTL optimization
Email Security
SPF, DKIM, and DMARC configuration analysis
- SPF record validation
- DKIM signature check
- DMARC policy analysis
Security Scan
Comprehensive security scan via Internet.nl
- TLS/SSL certificates
- Security headers
- DNSSEC validation
Most domains are still failing
We scanned 100 domains across .nl, .com, and .eu — the results are alarming.
60%
Score D or F
Most domains have critical DNS security gaps
37%
Strict DMARC enforcement
Only 37% use p=reject or p=quarantine
95%
Have SPF, but...
Only 59% use -all (hardfail) — the rest allow spoofing
65% vs 28%
DNSSEC adoption
.nl leads at 65%, while .com lags at 28%
Deliverability Scoring
We analyze your actual message: spam flags, DKIM alignment, misleading headers and more — just like mail-tester, but smarter.
The first DNS tool that actually tells you why your email ended up in spam.
Blacklist Check
Check multiple DNS blacklists instantly. Know if your IP or domain is flagged.
AI-Assisted Fixes
Get exact copy-paste fixes for every issue. No more guessing.
API Access
Integrate deliverability checks into your CI/CD or monitoring stack.
DNS + Message Debug
The only tool that combines DNS analysis with actual message inspection.
What we analyze in your message
Send a test email and get instant feedback
Test Your Email NowMore Tools
Everything you need for DNS and email security
Free DNS Record Generators
Build valid records in seconds — no signup required
Built for modern security needs
Deterministic security checks with AI-assisted explanations
AI-Assisted Explanations
Deterministic security checks with AI-assisted explanations and fix recommendations where available
Letter Grade Scoring
Easy-to-understand A+ to F grades for your security posture
Modern & Fast
Clean interface with parallel checks for instant results
Completely Free
No signup required. Free for normal use.
Internet.nl Integration
Deep scans powered by the Dutch Internet Standards Platform — the gold standard for compliance testing
Blacklist Monitoring
Check DNS blacklists instantly. Know if your IP or domain is flagged before it impacts deliverability.
Need broader security testing?
Need a broader infrastructure and web security assessment? Sign up via IntoDNS.ai and receive €20 scan credit for SecurityScan.
Try SecurityScanFrequently Asked Questions
Find answers to common questions about DNS and email security
Start Improving Your Security Today
Scan your domain now and get actionable recommendations to protect your email and DNS infrastructure