Email Header Analyzer
FreePaste a raw email header block to inspect message routing, Received hops and common authentication-related fields.
Related tools
Other utilities you may need.
How to use Email Header Analyzer
Paste the full header block from your mail client. Parsing runs locally in the browser.
Understanding the results
Received hops show the path the message took. Auth-related fields help explain SPF, DKIM or DMARC clues present in the headers.
Limitations
- Parsing is heuristic and depends on the header block you paste.
- Missing or truncated headers limit what can be shown.
Privacy note
Header parsing runs locally in your browser for the core tool.
Frequently asked questions
Where do I find raw headers?
Most mail clients have a Show original / View source / Message headers option.
What are Received hops?
Received lines record each server that handled the message, usually newest first.
Is the header processed locally?
Yes. The core analyzer runs in your browser.
Do I need an account?
No account is required for free tools on this site.