Overview
Email headers contain valuable diagnostic information such as sender IP addresses, mail server routing, authentication results (SPF, DKIM, DMARC), and timestamps. Viewing headers in Roundcube is straightforward and requires no additional configuration.
Steps to View Message Headers
- Log in to Roundcube Webmail.
- Click on the email message you want to inspect (you do not need to open it in full view).
- In the message preview pane or opened message, click the more options icon (three vertical dots ⋮) located in the top toolbar of the message area.
- Select go to the **More** menu (⋮) and click **Show Source**, which opens the full raw email including headers in a new window/tab.
- The full email headers will be displayed in a panel above or below the message body.
Alternative Method (Full-Screen View)
- Double-click the message to open it in full-screen mode.
- Click the down arrow (▾) on the far right of the message toolbar.
- Select View source to see the complete raw message including all headers and the body.
Important Notes
- Message headers are read-only — you cannot modify them from Roundcube.
- To copy headers for troubleshooting, select all the header text and copy it to your clipboard (
Ctrl+A, thenCtrl+C). - Common header fields to look for:
Received:(mail path),X-Spam-Status:(spam filtering),Authentication-Results:(SPF/DKIM/DMARC).
Troubleshooting
- Headers not appearing: Ensure your Roundcube installation is up to date. Older versions may have a different UI layout — look for a gear icon or "Headers" button instead of the three-dot menu.
- Need to paste headers into a tool: Use Google Admin Toolbox Messageheader to parse headers into a readable format.
