Email Header Analyzer

Paste an email's full headers (in most clients: "Show original" / "View source" / "Message options"). We parse delivery hops, delays and reported SPF/DKIM/DMARC results to help investigate a message.

This parser does not authenticate the message. Headers can be forged: trust authentication results only when your receiving mail provider added them. A reported pass does not prove the message is safe. See Authentication-Results trust boundaries.

Analyze

Everything is parsed locally in your browser — the headers are never sent anywhere.