Email Header Analyser
Paste the raw headers of a message to see its delivery path, per-hop delays and authentication results. Parsed in your browser and never uploaded.
Free, no sign up Runs in your browser, nothing is uploaded
Headers are parsed on this page only. Nothing you paste is sent to our servers.
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Getting suspicious emails?
Headers that fail SPF, DKIM or DMARC on mail that claims to be from your own domain are a classic spoofing sign. We configure email authentication, Defender for Office 365 and staff phishing training as part of our cyber security service.