Email Security Tester
Free, privacy-first checker for SPF, DKIM, and DMARC records
Email authentication is your first line of defense against cyber threats. Our comprehensive security checker analyzes three critical email security protocols that work together to protect your business communications.
Prevents email spoofing by verifying sender IP addresses
Adds digital signatures to prove email authenticity
Tells receivers how to handle suspicious emails
What We Check
SPF Records
Sender Policy Framework prevents email spoofing by specifying which servers can send mail for your domain
DKIM Signatures
DomainKeys Identified Mail adds cryptographic signatures to verify email authenticity
DMARC Policy
Domain-based Message Authentication tells receivers what to do with emails that fail SPF or DKIM
All DNS queries are performed client-side using Cloudflare's DNS-over-HTTPS. No data is collected, stored, or shared. Your domain information never touches our servers.
Take Your Email Security Further
Now that you understand your email security status, discover what else you can do to protect your business.
- • Comprehensive security gaps analysis
- • Personalized recommendations
- • NIST framework alignment
- • Actionable improvement roadmap
- • Step-by-step SPF/DKIM/DMARC setup
- • Email provider configurations
- • Common mistakes to avoid
- • Monitoring and maintenance
- • Free security testing tools
- • Security checklists
- • Implementation guides
- • Best practices resources
Microsoft Defender for Office 365
Advanced threat protection with AI-powered email filtering and real-time security.
Proofpoint Email Protection
Enterprise-grade email security with advanced threat intelligence and user training.
Mimecast Email Security
Comprehensive email security with backup, archiving, and continuity features.