Using color-coding of your Inbox messages from important senders.
1. Click Tools and select Organize.
2. Ways to Organize Inbox box will appear above the Inbox
3. On the left of the side, click on Using Colors.
4. Go to the Inbox and select a message from the sender whose messages you want to color-code.
5. Go back to the Organize pane.
6. After Color messages, select from (from the dropdown). In the textbox next to the dropdown, you will see the name of the desired sender. Select the desired color from the next dropdown and click the Apply Color button.
7. Repeat the above steps for each sender whose messages you wish to color-code. When finished, close the Organize pane by clicking the x in the upper-right corner of the pane.