Email Header Analyzer
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.
How it works
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.
Frequently asked questions
Is the Email Header Analyzer tool free to use?+
Yes. The Email Header Analyzer runs directly in NetInsight with no signup required. Free-tier usage is rate limited to keep the service fast for everyone.
Are my queries logged?+
Diagnostic inputs are processed to produce your result and are not sold or shared. See our Privacy Policy for full detail on retention.
How accurate are the Email Header Analyzer results?+
Results are fetched live from authoritative sources each time you run a check, so they reflect the current state rather than a cached snapshot.