Email Header Analyzer
Paste the full raw headers of an email to see its delivery path, hop-by-hop delays, and SPF/DKIM/DMARC results in plain English.
How to get raw headers: in Gmail, open the message → three-dot menu → "Show original". In Outlook, open the message → File → Properties → "Internet headers". In Apple Mail, View → Message → All Headers.
What am I looking at?
Every email carries hidden technical headers recording every server it passed through on its way to your inbox, plus whether it passed sender authentication checks. This is the same information mail providers use internally to fight spam and diagnose delivery problems — this tool just makes it readable.
Headers are analyzed in your request only and are not stored — nothing you paste here is saved.