Email Header Analyzer
Email Header Analyzer: Trace Delivery Hops, SPF, DKIM and DMARC Results
Paste the full raw headers of an email to see how it travelled from sender to inbox. The analyzer lists each server hop, highlights delays, and shows the authentication results (SPF, DKIM and DMARC) so you can tell whether a message was legitimate, spoofed or delayed. Everything is analysed in your browser and nothing is uploaded.
How to use it
- In your mail client open the message and choose View Source, Show Original or View Message Details.
- Copy the complete header block and paste it into the box.
- Press Analyze Header and review the hops and authentication results.
Frequently asked questions
Where do I find the full headers in Outlook or Gmail?
In Outlook open the message, then File, Properties and copy Internet headers. In Gmail open the message menu and choose Show original.
What does a failed SPF or DKIM result mean?
SPF fails when the sending server is not authorised by the domain. DKIM fails when the signature does not match the message. Both together often indicate spoofing or a misconfigured sender.
Is it safe to paste headers here?
The analysis runs locally in your browser. Headers can still contain internal server names and IP addresses, so redact anything sensitive before sharing screenshots.