About EmailDiag
The friendliest free email deliverability tool
Our Mission
We believe everyone deserves to have their emails delivered. Whether you're a small business owner, a developer, or someone who just wants their newsletter to reach subscribers — email deliverability shouldn't be a mystery.
EmailDiag was created to demystify email authentication. We provide clear, actionable diagnostics and step-by-step guides that anyone can follow, regardless of technical expertise.
Free Forever
Core features are free with no registration required. We believe basic email diagnostics should be accessible to everyone.
Easy to Understand
We explain technical concepts in plain language. Our guides are designed for humans, not just engineers.
Privacy First
We don't store your email content. Test results are temporary and automatically deleted after 24 hours.
What We Offer
- •Domain Check — Instantly analyze SPF, DKIM, DMARC, and MX records for any domain
- •Email Test — Send a real email and see exactly how receiving servers evaluate it
- •Blacklist Scan — Check if your domain or IP is listed on 50+ major blacklists
- •Setup Guides — Step-by-step instructions for Cloudflare, GoDaddy, AWS, and more
Get in Touch
Have questions, feedback, or suggestions? We'd love to hear from you.
hello@emaildiag.com