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How to View Full Message Headers in New Outlook
Question details
Users need to find and access complete internet message headers (From, Subject, Date, routing info) in the New Outlook interface.
- Product
- New Outlook
- Device & OS
- not provided
- Scenario
- Investigating email routing, checking detailed sender information, or troubleshooting email delivery issues.
- Observed behavior
- The traditional View settings do not explicitly display header options, making it difficult for users migrating to New Outlook to locate the complete message source.
Verify that you are using the 'New Outlook' interface, as the classic Outlook desktop application uses a completely different method (File > Properties) to access internet headers.
View Message Source via Right-Click Context Menu
The fastest way to access full internet headers is by right-clicking the email directly from your inbox list.
This method allows you to view the raw message data without even needing to open the email fully.
Find the target email in your inbox or any other folder in the New Outlook message list.
Right-click on the email message to prompt the context menu.
Navigate to 'View' in the menu, and then click on 'View message source'. A new window will pop up containing the complete internet headers.
Access Message Source from an Open Email
If you are already reading the email, you can access the message source using the More Options menu.
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Frequently Asked Questions
What information is included in a message header?
A message header contains detailed routing information, the sender's actual IP address, timestamps, and anti-spam authentication results (such as SPF, DKIM, and DMARC) to help verify the true origin of an email.
Why can't I find the 'Properties' dialog in New Outlook?
Microsoft completely redesigned the interface for New Outlook, making it function closer to the web version. The classic 'File > Properties' method used to view headers in older desktop versions has been replaced entirely by the 'View message source' option.
Can I view message headers on the Outlook mobile app?
No, currently the Outlook mobile application for iOS and Android does not support viewing full internet message headers. You must access your email account via a desktop browser or the desktop client to view the complete message source.
