A Powerful Tool for Phishing and Email Threat Analysis

Email remains one of the primary attack vectors used by cybercriminals. Phishing, spoofing, and business email compromise (BEC) attacks rely heavily on manipulating email headers to deceive recipients. To efficiently investigate suspicious emails, security analysts need a reliable and easy-to-use solution—this is where the Email Header Analyzer comes in.

What Is an Email Header Analyzer?

An Email Header Analyzer is a cybersecurity tool designed to parse and analyze raw email headers or .eml files. It extracts critical metadata and highlights security issues that may indicate spoofing, phishing, or malicious intent.

The tool processes email headers locally in the browser, ensuring that sensitive data never leaves the analyst’s environment.

Key Features

1. Raw Header & .eml File Analysis

Users can paste raw email headers directly or upload a .eml file. The tool automatically unfolds and parses complex headers, making them human-readable and actionable.

2. Authentication Results Breakdown

The analyzer clearly evaluates and summarizes:

• SPF (Sender Policy Framework)
• DKIM (DomainKeys Identified Mail)
• DMARC (Domain-based Message Authentication, Reporting & Conformance)

Failures or misconfigurations are highlighted with severity levels such as Critical, Warning, or Info, allowing analysts to instantly assess risk.

3. Originating IP Detection

The tool identifies the likely originating public IP address from the email’s Received headers. This is crucial for tracing the true source of an email, even when attackers attempt to hide behind relays or spoofed domains.

4. Header Consistency Checks

Common phishing indicators are automatically flagged, including:

• Mismatch between From and Reply-To domains
• Suspicious HELO/EHLO values
• Inconsistent sender information

These subtle anomalies are often missed during manual analysis.

Real-World Use Cases

• 🎣 Phishing Investigation: Quickly confirm whether an email claiming to be from a trusted brand is spoofed.
• 🧑‍💼 SOC & IR Teams: Speed up triage during incident response.
• 🔐 Email Security Audits: Validate SPF/DKIM/DMARC configurations.
• 📚 Security Training: Demonstrate real phishing techniques using safe, local analysis.

Designed for Efficiency and Privacy

The interface is built for analysts:

• Clean, dark-themed UI
• Clear summaries and visual severity indicators
• One-click copy for summaries or unfolded headers
• Example headers (clean, high-hop, malicious) for quick testing

Most importantly, all analysis runs locally in the browser—no headers are sent to external servers, preserving confidentiality and compliance.

Conclusion

The Email Header Analyzer is an essential tool for anyone involved in email security, threat hunting, or incident response. By transforming complex email headers into clear, actionable insights, it empowers analysts to detect phishing and spoofing attempts faster and with greater confidence.

In a threat landscape where email attacks continue to evolve, having a trusted header analysis tool is no longer optional—it’s critical.