Paste your headers
Copy the full original headers from your email client.
Local generation
Email Header Analyzer.
Read email routing hops and authentication results from pasted headers.
Email Header Analyzer
Enter a target to start a live check.
Headers stay in your browser. Reported authentication results are parsed, not cryptographically verified.
Follow your email’s journey
Paste full headers above to inspect routing and reported authentication.
Using Email Header Analyzer
Run the check
Headers stay in your browser. Reported authentication results are parsed, not cryptographically verified.
Keep the useful details
Copy or download your results. Follow a related tool to continue diagnosing.
Why can a check be unavailable?
Some servers block diagnostic traffic, DNS resolvers time out, or public data providers limit requests. An unavailable check is not a successful result. Try again later or compare with another tool.
Where are the checks performed?
Network and DNS requests originate from the server running this site. Propagation compares multiple public resolvers; their marked operator regions are not separate measurement probes. IP location information is approximate.
What should I know about these results?
Headers stay in your browser. Reported authentication results are parsed, not cryptographically verified.