Free Email Security Scanner - Check SPF, DMARC & DKIM Records
Instantly scan your domain's email security. Check MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT records and blacklist status in one click. Get copy-ready DNS fixes, improve email deliverability, and prevent spoofing. Free email authentication checker.
- • Free plan
- • No credit card required
- • Privacy-first
Trusted by teams improving email deliverability and security.
Free Email Security Tools
Check individual DNS records with our specialized tools. No signup required.
SPF Checker
Validate SPF record syntax, check DNS lookups (10-limit), and fix errors.
DMARC Checker
Test DMARC policy (p=none/quarantine/reject), check alignment and reporting.
DKIM Lookup
Auto-discover DKIM selectors, validate key length (1024/2048-bit).
SMTP TLS Checker
Test STARTTLS support, TLS versions (1.2/1.3), and cipher security.
MTA-STS Checker
Validate MTA-STS policy, DNS record, and TLS enforcement mode.
BIMI Checker
Validate BIMI record, SVG logo format (Tiny P/S), and VMC certificate.
Blacklist Check
Check if your IP or domain is listed on major email blacklists (RBLs).
TLS-RPT Generator
Generate TLS reporting DNS records to monitor email delivery issues.
Why teams use MXScan
Outcomes over features - get results that matter.
Instant DNS audit
MX, SPF, DKIM, DMARC, TLS-RPT, MTA-STS analyzed with one click
Blacklist checks
IP/domain RBL status + clear delist instructions
Copy-ready fixes
Valid DNS records pre-built (TXT/MX) for your provider
Scheduled monitoring
Weekly/daily checks and alerts when something breaks
How it works
Simple 3-step process to secure your email.
Enter your domain
We run 20+ security checks instantly
Fix with guided steps
Copy-paste DNS records or delist via direct links
Stay compliant
Turn on monitoring to prevent future deliverability issues
See the scan/results UI in action:
Live results preview
See exactly what you'll get with every scan
Real scan results
Start free - upgrade when you need
No credit card required. Scale as your team grows.
Free
- 3 domains
- Manual scans
Premium
- Up to 9 domains
- Scheduled scans
Ultra
- Up to 19 domains
- Priority support
FAQ
Answers to common questions.
Do you modify my DNS?
No, we only analyze your existing records and generate copy-ready DNS entries for you to implement yourself.
What's a DNS Fix Pack?
A copy-ready set of DNS entries with host, type, TTL, and value to quickly fix issues we find.
Do you store my DNS?
We store only what's needed to show results and history in your account. See Privacy for details.
How accurate is blacklist monitoring?
We check major RBLs and provide removal links. Accuracy depends on each list's update cadence.
What's the difference vs MXToolbox?
We provide guided, copy-ready fixes with step-by-step instructions, plus ongoing monitoring and alerts to prevent future issues.
Can I schedule monitoring?
Yes, Premium and Ultra plans include scheduled scans with email alerts when issues are detected.