Analyze Email Header

Analyze email headers to extract sender, recipient, routing, authentication results, and detect potential spoofing or security issues.

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< 15ms

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Client-Side Privacy

4.9 / 5.0

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About This Tool

This Email Header Analyzer tool allows you to paste raw email headers or upload a .eml file to parse and analyze all header fields. It extracts key information including sender, recipient, subject, date, message ID, and traces the routing path through servers. The tool performs security checks by analyzing SPF, DKIM, and DMARC authentication results to detect potential spoofing or phishing attempts. It also identifies common email header anomalies and provides a clean, organized view of all technical details for forensic analysis or troubleshooting email delivery issues.

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How to Use

Paste your raw email headers into the textarea OR click the upload area to select a .eml file
Optionally check analysis options like 'Show full headers' or 'Highlight security issues'
Click the 'Analyze Headers' button to process the headers
View the organized results including sender/recipient info, routing path, authentication results, and security analysis
Use the 'Copy Results' or 'Download Report' buttons to save your analysis

Frequently Asked Questions

Find Quick Answers

What are email headers and why analyze them?

Email headers are the technical metadata that accompanies every email, containing information about the sender, recipient, routing path, servers involved, timestamps, and authentication results. Analyzing headers helps identify the true origin of an email, detect spoofing or phishing attempts, troubleshoot delivery issues, and understand the email's journey across the internet.

What file formats does the tool support?

You can either paste raw email header text directly into the textarea, or upload a .eml file (standard email file format) which contains both headers and message body. The tool will automatically extract and analyze the header section from .eml files.

What security checks does the analyzer perform?

The tool analyzes SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting & Conformance) authentication results present in the headers. It checks whether these protocols passed or failed, helping identify potential email spoofing or phishing attempts where the sender's domain may be forged.

Does the tool store or transmit my email headers?

No, all processing happens entirely in your browser. The email headers are never sent to any server or stored anywhere. This ensures complete privacy for your sensitive email data.

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