Domain Security
Scanner
Comprehensive email authentication and security analysis
Check SPF, DKIM, DMARC, BIMI, MTA-STS and more in one scan
Comprehensive Domain Scan
Analyze all email authentication records and security settings
Full Authentication
SPF, DKIM, DMARC validation
Advanced Security
BIMI, MTA-STS, TLS-RPT checks
DNS Analysis
MX, A, TXT record validation
Why Comprehensive Scanning Matters
Email security requires multiple layers of authentication. A single missing or misconfigured record can expose your domain to spoofing and phishing attacks.
Get Complete ProtectionComplete Email Security Guide
Understanding all layers of email authentication and security
Basic Authentication
Authorizes sending servers
Cryptographic signatures
Policy enforcement
Advanced Security
Brand logo display
TLS encryption policy
TLS failure reporting
Infrastructure
Mail server routing
IP address mapping
Reverse DNS lookup
Why Domain Security Scanning is Critical
Email remains the primary vector for cyberattacks, with 94% of malware delivered via email. Domain security scanning helps identify vulnerabilities in your email authentication setup before attackers can exploit them. Regular scanning ensures your SPF, DKIM, and DMARC records remain properly configured as your email infrastructure evolves.
Email Authentication Standards in 2024
Major email providers including Google, Yahoo, and Microsoft now require comprehensive email authentication for bulk senders. This includes SPF, DKIM, and DMARC at minimum, with additional protocols like BIMI and MTA-STS becoming increasingly important for deliverability and brand protection. Our scanner checks all current and emerging email security standards.
Security Score Calculation
Your domain security score is calculated based on multiple factors including the presence and configuration of authentication records, policy strictness, reporting setup, and advanced security features. A score of 8 or higher indicates strong email security, while scores below 6 suggest significant vulnerabilities that need immediate attention.
Common Security Gaps Found in Scans
- Missing or misconfigured DMARC policies (found in 70% of domains)
- SPF records exceeding the 10 DNS lookup limit
- DKIM keys smaller than 2048 bits (security vulnerability)
- No subdomain policy specified in DMARC
- Missing MTA-STS for encryption enforcement
- Lack of reporting addresses for monitoring
- Incomplete coverage of all sending services
Automate Your Email Security
InboxKit continuously monitors and maintains your email authentication, ensuring maximum protection 24/7