Email Header Analyzer
Paste email headers to trace the sender IP, view hops, and check authentication.
FAQ
How do I find email headers?
In Gmail: open the email, click the three dots menu, select 'Show original'. In Outlook: open the email, go to File > Properties > Internet headers. Copy the full header text and paste it into this analyzer.
What do email headers tell you?
Email headers reveal the sender's IP address, the path the email took through mail servers (hops), SPF/DKIM/DMARC authentication results, and timestamps at each relay. This helps identify spam, phishing, or spoofed emails.
What are SPF, DKIM, and DMARC?
SPF verifies the sender's IP is authorized to send for that domain. DKIM adds a cryptographic signature to verify the email wasn't altered. DMARC ties SPF and DKIM together with a policy for handling failures. All three should show 'pass' for legitimate emails.