Messages sent only to you in Microsoft Outlook can be formatted in a unique way, making it easy to look at your email and know which ones to open. The instructions in this article apply to Outlook 2019, 2016, 2013, 2010; and Outlook for Microsoft 365.
How to Mark Important Emails in Outlook?
Use conditional formatting to make specific messages stand out.
On the View tab, in the Current View group, select View Settings.
Select Conditional Formatting.
