Email Header Analyzer
Paste the raw headers of an email to trace its delivery path, measure delays at each hop and check authentication results.
Email Header Analyzer
Routing hops · delays · SPF/DKIM/DMARC · alignment scoring
About this tool
Email headers record the full journey a message took from sender to inbox. Paste the raw headers and this tool lays out each Received hop in order, shows the delay added at each step, and surfaces the SPF, DKIM and DMARC authentication results.
The analysis runs entirely in your browser, so the contents of your mail stay private. It is a quick way to diagnose slow delivery, find where a message was held up, and confirm whether a sender passed authentication — useful when investigating spam or spoofing.