Our 3 Core Engineering Pillars
Every architectural decision in DMARCPro is guided by privacy, technical precision, and open access.
1. Zero Data Retention
Your domain names, email addresses, and DNS records never touch a centralized server backend. Record generation and syntax parsing run entirely in client-side Web Worker threads in your browser.
2. Direct DNS over HTTPS (DoH)
When you inspect a domain, your browser dispatches encrypted queries directly to Cloudflare (1.1.1.1) and Google Public DNS (8.8.8.8) using RFC 8484. No third party intercepts or catalogs your internal domain infrastructure.
3. Strict RFC Fidelity
We implement exact RFC standards: RFC 9989 for DMARC (including modern tags like np=), RFC 7208 for SPF (lookup tree recursion depth & single TXT rule), and 2026 bulk sender compliance policies.
Why We Built DMARCPro
When Google and Yahoo enforced strict email authentication requirements in 2024, millions of small businesses, founders, and engineers suddenly found their emails landing in spam.
Unfortunately, the existing DNS tools online responded by putting basic syntax checkers behind expensive $200/month paywalls, harvesting user domain lists for sales prospecting, or producing syntactically invalid SPF records that triggered the RFC 7208 10-lookup limit PermError.
DMARCPro was born to provide a completely transparent, private, and mathematically accurate alternative that anyone can use freely without signing up or sacrificing privacy.
Support the Independent Project
DMARCPro is independently maintained and funded. If this utility saved you hours of debugging or helped your business achieve 100% inbox deliverability, consider supporting ongoing development.