Email Header Analysis
Analyze email headers and diagnose delivery problems. Check SPF, DKIM, DMARC validation.
What are email headers?
Email headers are metadata attached to every email message. They contain information about the sender, recipient, the route the email traveled, authentication results (SPF, DKIM, DMARC), and many other technical details. Usually this data is invisible, but it is invaluable when diagnosing delivery problems.
How to get email headers?
In most email clients, you can view headers through the message settings. Gmail: open the email, click the three dots and select "Show original". Outlook: open the email, click "File" and "Properties". Copy the entire header text and paste it into this tool.
What can you learn from headers?
Headers reveal whether the email passed SPF, DKIM, and DMARC checks, which servers it traveled through, how long delivery took, and whether it was flagged as spam. This is essential information for solving delivery problems.
When to use this tool?
Use it when emails end up in the spam folder and you want to understand the reason, when you need to verify SPF/DKIM/DMARC configuration in real-world conditions, or when diagnosing delays in email delivery.