Free Developer Tool
Email Header Analyzer
Paste raw email headers to trace the delivery path, check SPF · DKIM · DMARC,
calculate hop delays, and flag security issues — 100% in-browser, no upload.
Overview
Authentication
All Headers
| Header | Value |
|---|
📨
Paste raw email headers above and click Analyze.
To get email headers in Gmail: open the email → ⋮ menu → Show original.
In Outlook: File → Properties → Internet headers.