Analyze email headers to detect spoofing, track email routes, and identify security issues
Want to embed this email header analyzer on your website? Use this code:
Example of a properly authenticated email header:
Characteristics: Proper SPF, DKIM, DMARC authentication
Example of a spoofed email with failed authentication:
Warning Signs: Failed SPF, DKIM, DMARC, suspicious IP
Example showing multiple received headers from forwarding:
Note: Multiple received headers show the email path
Example header from mobile email client:
Characteristics: Mobile relay server, user agent info
Learn how to read and interpret email headers, including all the important fields and what they mean for email security.
Read Tutorial →Understand the three key email authentication protocols and how they work together to prevent email spoofing.
Read Tutorial →Learn the telltale signs of spoofed emails and how to use header analysis to identify phishing attempts.
Read Tutorial →How to trace an email's path through the internet using the Received headers and IP address information.
Read Tutorial →Advanced methods for analyzing complex email headers, including dealing with forwarded emails and mailing lists.
Read Tutorial →Forensic techniques for investigating suspicious emails, including timestamp analysis and server verification.
Read Tutorial →Compare our free email header analyzer with other popular tools and services:
| Feature | Our Tool | Tool A | Tool B | Tool C |
|---|---|---|---|---|
| Free to Use | ✅ | ✅ | ❌ (Premium) | ✅ |
| SPF/DKIM/DMARC Analysis | ✅ | ✅ | ✅ | ❌ |
| Security Risk Assessment | ✅ | ✅ | ✅ | ✅ |
| IP Geolocation | ✅ | ✅ | ✅ | ❌ |
| No Data Storage | ✅ | ❌ | ❌ | ✅ |
| Detailed Explanations | ✅ | ❌ | ✅ | ❌ |
| Mobile Friendly | ✅ | ✅ | ✅ | ✅ |
| Export Results | ✅ | ❌ | ✅ | ❌ |
| Educational Content | ✅ | ❌ | ❌ | ❌ |
We don't store your email headers or analysis results. All processing happens in your browser for maximum privacy.
Detailed analysis of SPF, DKIM, DMARC authentication and identification of potential security risks.
Clear, organized presentation of header information with security indicators and explanations.
Not just a tool - includes comprehensive guides, examples, and tutorials to help you understand email security.
Email headers are the hidden part of every email that contains technical details about the message's journey from sender to recipient. They include information about the sender, recipient, route taken, authentication results, and more.
SPF allows domain owners to specify which mail servers are authorized to send email from their domain.
DKIM uses cryptographic signatures to verify that an email was sent by an authorized server and wasn't tampered with.
DMARC builds on SPF and DKIM, allowing domain owners to specify how to handle emails that fail authentication.
An emerging standard that helps identify legitimate emails from trusted brands.
Our email header analyzer processes headers through several stages:
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