Paste an email's headers to see if it really came from who it claims, and every server it passed through.
🔒 Headers are analysed in your browser – nothing is uploaded.
How to use the email header analyzer
- Open the email and copy its full headers (Gmail: More > Show original).
- Paste them in the box.
- Click Analyze and review the authentication results and warnings.
Spotting a fake email
If SPF, DKIM or DMARC fail, or the Reply-To address goes to a different domain from the sender, treat the email as suspicious – especially if it asks for payment, passwords or bank changes.
Finding delivery delays
Each hop shows how long the message waited. A big gap points to the server responsible for the delay.
Frequently asked questions
How do I see email headers in Gmail?
Open the email, click the three dots and choose Show original.
How do I see headers in Outlook?
Open the email, then File > Properties > Internet headers.
Is it safe to paste headers?
Yes, they are analysed only in your browser.