Instantly diagnose email delivery issues, detect spoofing attempts, and verify SPF, DKIM, and DMARC authentication. Paste a raw email header to analyze authentication results, routing paths, delays, and security risks.
Paste Email Header
Copy the full raw headers from your email client and paste below
In Gmail: open email → More → Show original. In Outlook: File → Properties → Internet headers.
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Paste an email header above to begin
Copy the full raw headers from your email client. The analyzer checks authentication, routing, and spoofing indicators instantly.