Email Header Analyzer
How to use this email header analyzer
- Open the original email and find "Show original" or "View source" in your email client.
- Copy the full raw header block and paste it here.
- See the SPF/DKIM/DMARC results and delivery hop chain instantly.
Does this send my email anywhere?
No — this parses the text entirely in your browser using pattern matching. Nothing is uploaded, and this tool doesn't even make a network request.
Why are there multiple "Received" lines?
Each mail server that handled the message adds its own Received line at the top — reading them bottom to top shows the actual path the email took from sender to your inbox.
What does it mean if SPF or DKIM shows "fail"?
A fail means the receiving server couldn't verify the message came from an authorized source for that domain — a strong signal (though not absolute proof) that the message could be spoofed or misconfigured.