Email Header Preview
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Email Header Forensic Results
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Email Header Analyzer
Analyze email headers to review routing paths and authentication results in a clear and structured format.
Email Routing and Authentication Review
The Email Header Analyzer is a tool that looks at email headers to figure out how an email was sent and checked. It looks at the information that you can see in the headers and the path the email took to get to you. It does not try to guess what the person who sent the email was thinking or what the email says. The tool gives you a summary of what it finds and tells you what it cannot do. This helps you understand what is going on when you are trying to fix a problem or learn about emails.
What This Tool Does
This tool helps you look at email headers in a way. It does not look at your inbox, read your emails or talk to the mail servers. It just looks at the information that's already in the headers.
Here are some things the tool can do:
- It looks at the path the email took to get to you and the servers it went through.
- It checks if the email was authenticated using things like SPF, DKIM and DMARC.
- It finds out which mail servers and relays were used.
- It points out if any information is missing or does not make sense.
- It gives you explanations and tells you what it cannot do.
How the Email Header Analysis Works
Step 1: Obtain the full email header
First you need to get the email header from your email provider. Most email services let you do this. For example:
- In Gmail you open the email, click the three dots to the reply button and select Show original. Then you can download the email as a file. Copy the header text and save it.
- In Microsoft Outlook on your desktop, you double-click the email click File and select Properties. Then you can copy the header text. Save it.
- In Yahoo Mail you open the email, click the three dots and select View raw message. Then you can copy the header content. Save it.
- In Apple Mail on a Mac, you open the email, go to the View menu and select Message → All Headers. Then you can copy the header text. Save it or export the email as a file.
Make sure to save the header exactly as it is without changing or removing anything. This helps keep the information about the emails path and authentication.
Step 2: Upload the email header
Next you upload the header to the Email Header Analyzer. The tool can use files that end in.eml. Plain text files that have the full email header.
Step 3: Header validation and structure review
Then the tool checks if the header is in a format that it can understand. It looks for fields like the message ID, timestamps and server entries.
Step 4: Routing path review
After that the tool looks at the path the email took to get to you. It shows you which servers the email went through before it was delivered.
Step 5: Authentication result review
The tool also looks at the authentication results if there are any. This includes things like SPF, DKIM and DMARC.
Step 6: Review analysis results
Finally, you can see the results of the analysis on the screen. This includes the path, the email took the authentication and any limitations.
Types of Indicators Examined
- The tool looks at the information about the path the email took to get to you. This includes the mail servers and relays that were used.
- It also looks at the authentication results. This includes things like SPF, DKIM and DMARC which can tell you if the email passed the checks.
- The tool checks if the header is consistent and if any information is missing or unusual. This can affect how confident you can be in the results.
Understanding Confidence and Limitations
Email headers show you how the email was handled by the sending and receiving mail systems. The results depend on how the server set up and how the email was handled. If an email is forwarded or goes through a mailing list, the headers can change even if the email is legitimate. This can make it harder to understand the results.
You should consider the context when you look at the results. The tool is updated regularly to account for differences in how email providers format their headers.
Responsible Use and Interpretation
This tool is meant to help you understand the side of things. It does not say if an email is legitimate or not and it does not try to figure out what the sender was thinking. Legitimate emails can fail the authentication checks for reasons. The results are for information and should not be the only thing you use to make a decision.
Privacy and Data Handling
This tool is designed to protect your privacy. The files you upload are only used for analysis. Are not stored, shared or used to train the tool. The files are deleted automatically after they are processed. You can find information about this in Privacy Policy
Frequently Asked Questions
What is an email header?
An email header is a block of technical information attached to every email. It contains routing details,
timestamps, and authentication results. The header does not include the message body.
What does an Email Header Analyzer do?
An Email Header Analyzer reviews header fields to explain how an email was delivered. It helps users understand
routing and authentication details. The analysis is limited to header data only.
Can email headers show where an email came from?
Headers can show the mail servers that handled the email during delivery. However, forwarding, relays, or gateways
can affect how this information appears. Headers should be interpreted carefully.
What are SPF, DKIM, and DMARC?
SPF, DKIM, and DMARC are email authentication methods. They help receiving servers verify sending systems and
message integrity. Results depend on how domains and servers are configured.
Does a failed authentication mean an email is unsafe?
No. Authentication failures can occur for legitimate reasons. Forwarding, mailing lists, or server settings may
affect results without indicating abuse.
Can forwarded emails change header information?
Yes. Forwarded and relayed emails often add new header fields. This can change routing visibility and
authentication outcomes.
Does the tool read email content or attachments?
No. The tool only processes header data. It does not read email bodies or analyze attachments.
Are uploaded email headers stored or shared?
No. Email headers are analyzed only during the active session. They are not permanently stored or shared with
third parties.
Can header analysis be used for investigations?
Header analysis supports technical understanding and review. Formal investigations usually require additional
evidence and professional validation.
Is this tool useful for learning how email delivery works?
Yes. The tool is commonly used to learn how email routing and authentication work. It is suitable for education
and troubleshooting.
Important Notice
This tool is provided for informational and educational purposes. It does not provide legal advice or certify security findings. For formal assessments, professional review is recommended.