Paste raw email headers to visualise the hop-by-hop delivery path, delays and authentication results.
Enter a value above and run the check to see results here.
Paste raw email headers to visualise the hop-by-hop delivery path, delays and authentication results.
This tool runs entirely in your browser — your input never leaves your device.
Yes. The Email Header Analyzer runs directly in NetInsight with no signup required. Usage is rate limited per IP address to keep the service fast for everyone.
Diagnostic inputs are processed to produce your result and are not sold or shared. See our Privacy Policy for full detail on retention.
Results are fetched live from authoritative sources each time you run a check, so they reflect the current state rather than a cached snapshot.