Paste your email headers
Use the original received message, not a forwarded copy or a screenshot. Only the header block is needed; leave out the email body.
Get the full headers from the received message
In Gmail on the web, open the message and choose More next to Reply, then Show original. In new Outlook, choose More actions, View, then View message details. Classic Outlook for Windows uses File, Properties in the opened message.
Copy the header block above the first blank line. Keep repeated Received fields and indented continuation lines. The email header guide walks through an example.
Choose the next check from the result
- Authentication failed: compare your receiving provider's verdict with the sender configuration. Check the relevant SPF record, DKIM selector or DMARC policy.
- The message arrived late: find the largest timestamp gap, then match the message ID and time with your provider's delivery log. Clock differences and missing hops can distort the apparent delay.
- Authentication passes but the campaign lands in spam: send the finished campaign through your normal provider and test inbox placement. Headers alone do not show campaign-wide inbox reach.
FAQ
What does this email header analyzer do?
It parses the header text you paste, summarizes reported SPF, DKIM and DMARC results, and shows Received hops and grouped header fields. It does not independently rerun authentication or determine which folder received the message.
Where do I find email headers in Gmail or Outlook?
In Gmail on the web, open the message, choose More next to Reply, then Show original. In new Outlook, choose More actions, View, then View message details. In classic Outlook for Windows, open the message in its own window and choose File, Properties, then Internet headers.
Does a pass result mean the email is safe?
A pass copied from a header is a reported result. Check that Authentication-Results was added by your receiving provider. Even a verified authentication pass does not establish that the content is safe or wanted.
Why is an authentication result missing?
The header block may be incomplete, the receiving service may not have recorded that check, or the field may not be recognized by the parser. A missing result is not a pass or a fail. Copy the full original headers and check the receiving provider's own message details.