See the road an email took.
Paste the raw header of any email. You'll see every server it passed through, how long each step took, and whether SPF, DKIM and DMARC passed. It runs in your browser, so nothing you paste is sent to us.
What this header says
Authentication
There is no Authentication-Results line in what you pasted. The receiving server adds it, so copy the header from the inbox that got the email.
Details
Route, oldest first
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If something in this header failed and you're not sure why, leave your email and we'll write back.
How to read a header
Where to find it, and what to look at.
Every email carries a header. Most people never see it, but it records where the email went and what the receiving server checked. The lines stack up as the email travels, so the oldest line sits last.
Find the raw header
Gmail: open the email, click the three dots, then Show original. Outlook: open the email, then File, Properties, and copy the Internet headers box. Apple Mail: View, then Message, then Raw Source.
Received lines
Every server that handles the email adds a Received line above the others. The last one is where the email started. The first one is where it arrived. A long gap between two lines means a server held on to it.
Authentication-Results
The receiving server writes down what it checked. SPF: was this server allowed to send for the domain? DKIM: was the email signed, and does the signature still match? DMARC: do those checks line up with the From address?
Spam scores
X-Spam-Score and X-Spam-Status come from SpamAssassin. X-Forefront-Antispam-Report comes from Microsoft. They show how the receiving side scored the email before it decided where to put it.
Want to check the records behind these results? Try the domain health checker or the blacklist checker.
Rather not read headers yourself?
Our team sets up your sending domain, checks every SPF, DKIM and DMARC record, and looks at bounces, complaints and blocklists after every send.