EMAIL HEADER
ANALYZER
Paste the raw headers from an email to see exactly how it travelled: every server it passed through, the delay at each hop, the From, To and Subject, the authentication results for SPF, DKIM and DMARC, and the originating IP. Everything is parsed in your browser, so the headers are never uploaded.
What is an Email Header Analyzer?
An email header analyzer is a free tool that reads the raw headers of an email to trace how it was delivered. It lays out every server the message passed through and the delay at each hop, the From, To and Subject, the SPF, DKIM and DMARC authentication results, and the originating IP, all parsed in your browser.
How does an Email Header Analyzer work?
- 01Copy the full, raw headers from your email client (Show original).
- 02Paste them in; parsing happens entirely in your browser.
- 03We lay out the delivery hops, timing, and authentication results.
Frequently asked questions
How do I get the raw headers of an email?
In Gmail, open the message, click the three-dot menu and choose Show original. In Outlook, open the message and go to File, Properties, and copy the Internet headers. In Apple Mail, use View, Message, Raw Source. Paste the full block here, including every Received line.
What do the Received lines tell me?
Each Received line is one hop the message made between mail servers, listed newest first. Reading bottom to top shows the path from sender to you, with a timestamp at each step. Large gaps between hops reveal where a message was delayed, which is the usual cause of slow email delivery.
What are SPF, DKIM and DMARC in the results?
They are the three checks that decide whether an email is genuine. SPF confirms the sending server is authorised, DKIM verifies the message was not tampered with, and DMARC ties both to the visible From address. A pass on all three means the mail is properly authenticated; a fail is a sign of spoofing or misconfiguration.