Email Header Analyzer
Paste complete raw email headers to inspect authentication results, routing hops, sender identity and message metadata. Processing happens locally in your browser.
Privacy-first: the pasted header is analyzed in your browser and is not sent to the SkullCheck backend.
ABOUT THIS TOOL
What the Email Header Analyzer extracts
Raw message headers contain routing and authentication evidence added by mail systems along the delivery path. SkullCheck parses common Received and Authentication-Results fields, message identity fields and IP addresses so you can inspect delivery flow and authentication outcomes in a more readable format. Header parsing is performed in the browser.