What you’ll need
Paste raw headers or load a text/EML file.
Email TOOL · FREE TO USE
Email Header Analyzer
Read routing and reported authentication without uploading a message.
Runs on your device · Files stay privateYour email workspace
How it works
Unfold headers, list Received hops and explain Authentication-Results.
Know the limits
Reported authentication may be forged outside a trusted receiving boundary; this is not cryptographic verification.
GET FROM A QUESTION TO A NEXT STEP
Get a clearer result with Email Header Analyzer
Read routing and reported authentication without uploading a message. Paste raw headers or load a text/EML file. Review the supported scope below before adding a large file or using the result in a campaign.
How to use Email Header Analyzer
Open Email Header Analyzer and inspect its input labels. Paste raw headers or load a text/EML file.
Use the synthetic example where available, or choose your own supported file. Set the options deliberately; processing takes place in your browser.
Run the workflow, read any warnings and inspect the output. Download the result only after checking the values or file preview; clear the workspace when finished.
What do the results mean?
Unfold headers, list Received hops and explain Authentication-Results. Reported authentication may be forged outside a trusted receiving boundary; this is not cryptographic verification.
What to do next
Check a small representative input first. For exported assets, reopen the downloaded file in its intended application before using it in production.
Keep the scope in mind
Reported authentication may be forged outside a trusted receiving boundary; this is not cryptographic verification.
Common questions about Email Header Analyzer
Does Email Header Analyzer save my input?
This workflow uses browser memory. Downloads are saved by your browser, but tool inputs are not submitted to a server or stored by this tool.
What should I do if a result is unavailable?
Check the input format, units and limits. Reported authentication may be forged outside a trusted receiving boundary; this is not cryptographic verification. An unavailable result does not establish that a campaign, document or email address is valid or invalid.