Email header analyzer

Paste the full headers of an email (in Gmail: ⋮ → Show original; in Outlook: File → Properties → Internet headers). You will see the real sender, the SPF, DKIM and DMARC results, each server the email passed through with the delay at each step, and warning signs of phishing. The headers are read in your browser and never sent to us.

Questions and answers

Why did my email go to spam?

Look at the SPF, DKIM and DMARC results first: a fail is the most common reason. Then check the spam score lines, if the receiving server added any.

How do I spot a fake (phishing) email?

Warning signs are a failed DMARC check, a Reply-To address at a different domain than the From address, and a first server that has nothing to do with the company the email claims to be from.

Why was my email delayed?

The table shows the time at each server. A long gap between two steps shows where it waited, often because of greylisting or a busy server.

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