One of the ways to organize your messages in Outlook is to apply colors to message fonts; you first create color categories and then assign them to messages. You can choose from some default categories, such as unread mail, or set the formatting yourself.
To organize your messages by applying a colored font to unread messages in your Inbox:
One way to organize messages is to mark them read or unread. To do this, right-click the message in your Inbox and select Mark as Unread (if it has been read) or Mark as Read (if it is unread).
To flag a message for follow-up, right-click it and select Follow Up and then select Flag Message.
You can ignore a message; that message and all future messages will be moved to the Trash folder.
To ignore a message, right-click it, select Ignore, and then click Ignore Conversation to confirm.
You can use categories with messages as a way to organize them.
To apply categories: