EMAIL STUDIO · FREE

Email Header Analyzer

Paste an email's headers to see its route, the delays and whether SPF, DKIM and DMARC passed.

Runs in your browser. Nothing you type is stored or sent.

Paste the full email headers (Gmail: open the email, ⋮ > Show original)

How it works

1Open the email and copy its full headers (Gmail: Show original).
2Paste them in.
3Check the authentication results and any slow hops.

Questions

Where do I find the headers?

Gmail: the three dots > Show original. Outlook: File > Properties > Internet headers. Apple Mail: View > Message > All headers.

Is my data sent anywhere?

No. This runs in your browser, so what you type stays on your device.

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About the Header Reader

The Header Reader turns raw email headers into a clear route: every server the message passed through, the delays, and whether SPF, DKIM and DMARC passed.

When to use it

Find out why an email arrived late.
Check whether a suspicious email is really from who it claims.
Debug authentication failures.

Tips for a better result

In Gmail, open the message menu and choose Show original to copy the headers.

Built for small business admin

These tools handle the paperwork and email setup a small business needs every week, without a subscription. Documents are made in your browser and download as clean PDFs. When the paperwork outgrows a free tool, we build the website, client portal or system that does it for you.

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