Email Header Analyzer
Paste raw email headers to get a full breakdown of routing, delivery hops, authentication results and timing.
Frequently asked questions
Where do I find email headers?
In Gmail: open the email, click the three-dot menu, then 'Show original'. In Outlook: open the email, go to File > Properties > Internet headers. In Apple Mail: View > Message > All Headers.
What does DKIM=pass mean?
DKIM=pass means the email's DKIM signature was verified successfully — the email content has not been tampered with since it was signed.
What does SPF=fail mean?
SPF=fail means the sending IP is not listed in the domain's SPF record — the email may be spoofed or sent from an unauthorised server.