DNS Diagnostics
Made Simple
Stop guessing why your emails land in spam. Diagnose DNS issues, get AI-powered explanations, and fix them in seconds.
Why Smart DNS?
Most DNS tools are built for sysadmins. Smart DNS is built for product teams, developers, and founders who need things to just work.
Instant Diagnostics
Get a comprehensive analysis of your DNS records in milliseconds. We check A, MX, TXT, SPF, and DMARC records automatically.
Security Logic
Identify vulnerabilities in your email setup. We explain risks in plain English so you don't need to be a security expert.
Learn & Fix
Don't just see errors—understand them. Our AI-driven explanations guide you through the 'why' and 'how' of every record.
Verified Templates
One-click copy configurations for your favorite tools.
Google Workspace
Microsoft 365
Resend
SendGrid
Cloudflare
AWS SES
DNS Propagation Checker
Check if your DNS records have propagated across global resolvers.
Compare DNS Records
Side-by-side comparison of two domains' DNS configuration.
Learn DNS Records
Understanding DNS doesn't require a CS degree. Click any record type below to learn what it does, why it matters, and how to configure it correctly.