With Kutools for Outlook’s Duplicate Emails feature, you can quickly find and delete them from multiple mail folders, or find and delete all duplicates from the selected ones with two clicks in Outlook.

1. Get into the email folder which you want to highlight emails from a specific sender.

2. Please click View > View Settings.

Note: In Outlook 2007 or earlier versions, please click View > Current View > Customize Current View.

3. In the Advanced View Setting dialog box, please click Conditional Formatting.

Note: In Outlook 2007 or earlier versions, please click Automatic Formatting button in the Custom View dialog box.

4. In the Conditional Formatting dialog box, please click the Add button, and then name the new conditional formatting rule in the Name box. See screenshot:

5. Still in the Conditional Formatting dialog box, please click the Font button to open the Font dialog box, and then specify the formatting you will set for the conditional formatting rule. See screenshot:

6. Still in the Conditional Formatting dialog box, please click the Condition button; in the opening Filter dialog box, please type the specified sender's email address into the From box. See screenshot:

7. Then click OK buttons to save the new conditional formatting rule.

Now you can see all emails from the specified sender are highlighted with your specific formatting. And when you receive messages from this specified address next time, the emails are highlighted automatically.