Privacy

DNS lookups

Checks run in your browser. Your browser sends DNS questions (for example “TXT record of _dmarc.yourdomain.com”) directly to Cloudflare's public resolver at cloudflare-dns.com, and to Google Public DNS at dns.google if Cloudflare doesn't answer. Those requests don't pass through our servers. Cloudflare's and Google's own privacy policies apply to them.

Files our server fetches

Browsers can't read the MTA-STS policy file or BIMI logo and certificate from other websites, so for those two checks your browser asks our Cloudflare Function, which fetches the URLs published in the domain's own DNS and returns them. We don't log or store the domain or the files beyond Cloudflare's standard request handling and a 5-minute cache.

No accounts, no tracking

There are no accounts, cookies, analytics or advertising. Your theme choice is stored in your browser's local storage.