Find out why your emails fail — before your recipients do
Send one test email and get a complete authentication report: SPF, DKIM, DMARC, PTR, MTA-STS, DANE, and more — with plain-English explanations, record validation, and suggested fixes.
Check my email setup →How it works
- Get a disposable address
One click generates a private test inbox unique to your session.
- Send your test email
Send from any provider — your own server, Microsoft 365, Google Workspace, or anything else.
- See your full report
Results appear automatically within seconds. No refresh needed.
What gets checked
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SPF, DKIM & DMARC
Live authentication results against your DNS records, with plain-English explanations of every pass, fail, or missing record — and what to do about it.
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Record validation & fix suggestions
SPF, DKIM, and DMARC records are checked for formatting errors, duplicate records, weak policies, and deprecated mechanisms. Fixable issues come with a corrected record you can copy straight into your DNS.
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PTR, MTA-STS & DANE
Reverse DNS lookup on the sending IP, plus transport security policy checks — so you know whether your domain enforces encrypted delivery.
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Full routing path
Every hop your email took from sender to inbox, with server names, IP addresses, timestamps, per-hop delay, and whether each connection used TLS.
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Header analysis
Every email header explained in plain English — including vendor-specific headers from Microsoft 365, Exchange, Google Workspace, Barracuda, IronPort, and Proofpoint.
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Private by design
Email content is never stored or logged. Results are automatically deleted after 30 minutes. No account, no tracking, no data retained.
Ready to test?
Works with any sending domain — your own mail server, Microsoft 365, Google Workspace, Proton Mail, or any other provider.
Start a free check →