MailAuthGuard
Automated email deliverability, SPF lookup cap, DKIM, and DMARC auditor API
✓ Sub-45ms Edge
âš¡ RFC 7208 10-Lookup Engine
Freemium
$0 / $19/mo Pro
Solopreneur Technical Breakdown
Comprehensive edge API checking SPF recursion depth (RFC 7208 10-lookup cap), DMARC policy mode, DKIM key strength, BIMI, and MTA-STS in under 30ms to guarantee Google & Yahoo bulk sender compliance.
Key Strengths
- ✓ Calculates exact DNS query recursion depth to prevent PermErrors
- ✓ Verifies BIMI and Verified Mark Certificates for inbox brand logos
- ✓ Sub-30ms global edge latency powered by Cloudflare Workers and DoH
Operational Constraints
- ✗ Focused on technical DNS and RFC authentication rather than manual warmups
Architecture & Features
- • Composite deliverability health score (0-100) & letter grade
- • RFC 7208 10-lookup depth tracker
- • Google & Yahoo 2024 compliance validator
- • Node.js/TypeScript SDK 'mailauthguard-client'
Target Persona & Scalability
SaaS builders, cold emailers, and platform engineers ensuring 99%+ inbox placement.