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Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. To better assist you to solve the problem, could you please describe more about the issue?
- Does the issue occur on the Outlook desktop client? To further confirm if the issue is more related to Outlook desktop client, if possible, please log in to your web mail and do the same test to check if the issue persists.
- Do you have any specific operation before the issue occurred?
- Could you provide a screenshot of the error for our better research? (In order to avoid privacy leakage, please remember to hide your personal information.)
In addition, please Check Email Client Settings (View>Current view>View Settings>Columns), ensure that your email client is configured to display all email headers. It is recommended that you try resetting the view (View>Current view>Reset View) to see if the issue persists.
Meanwhile, you may refer to the article to view message headers.
Hope it helps!
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