Email Header Analyzer
Unfold email headers and inspect routing and authentication claims.
Processing stays in your browser. Shows claims in the pasted headers. It does not verify SPF, DKIM, sender identity, or decode MIME encoded words.
How to use the email header analyzer
Unfold email headers and inspect routing and authentication claims. Complete the raw email headers fields above, or upload a UTF-8 text file for raw email headers. Choose Run tool, review the output, then copy or download the result.
Example
Repeated Received headers remain separate routing hops.
Good to know
Shows claims in the pasted headers. It does not verify SPF, DKIM, sender identity, or decode MIME encoded words.