Diagnose your email configuration
Send a test email and instantly see whether your SPF, DKIM, DMARC, and PTR records are configured correctly — with plain-English explanations and fix instructions.
Check my email setup →Features
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Send one email
Get a disposable address, send any email to it, results appear automatically. No setup required.
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Four checks in one
SPF, DKIM, DMARC, and PTR all checked simultaneously against live DNS and Cloudflare's authentication results.
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Fix instructions included
When something fails you get the current DNS record, an explanation of what's wrong, and exact steps to fix it.
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GeoIP & PTR lookup
See the sending IP's country, city, and organization alongside the reverse DNS hostname of the mail server.
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Private by design
Email content is never stored. Results are deleted after 30 minutes. No account, no tracking.
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Instant results
The page polls automatically — results appear within seconds of your email arriving, no refresh needed.
Ready to test?
Works with any sending domain — your own server, Microsoft 365, Google Workspace, Proton, or any other provider.
Start a free check →