~/tools/email-header-analyzer
READY
Paste email headers to trace the message route, verify SPF/DKIM/DMARC authentication, detect spoofing attempts, and identify the originating server. All parsing runs client-side.
┤ OUTPUT ├
[INIT] email-header-analyzer v1.0.0 loaded
[INFO] All processing runs in your browser
[INFO] No data is transmitted to any server
┤ AUTHENTICATION ├
┤ MESSAGE ROUTE ├
┤ KEY HEADERS ├
┤ ALL HEADERS ├
0 headers parsed
What are email headers?
Every email carries hidden metadata — the headers. They record every server the message passed through, authentication results, timestamps, and the originating IP address. Headers are added by each mail server in the chain.
What do SPF/DKIM/DMARC mean?
SPF verifies the sending server is authorized. DKIM cryptographically signs the message content. DMARC ties SPF and DKIM together with a policy for failures. All three passing = high confidence the email is legitimate.