You can send messages in various formats. HTML messages support the most formatting, including stationary and themes.
You can create a signature for Outlook to add to new messages and/or forwarded messages and replies you send.
Messages can be grouped and sorted by sender, time, subject, size , or other fields.
You can create rules to display messages in particular colors depending on the sender, subject, contents, time, who else they were sent to, or almost any other criteria.
You can flag new and received messages for follow up at a later time. All your flagged messages appear in your For Follow Up folder, and Outlook can send you a reminder when the follow-up is due.