How to get the name formated in the Notes in box

I have a client that wants names in the inbox for internal Notes mail to appear as Dr. Brown rather than Charlie Brown. This can be done with internet mail by "Dr. Brown"CBrown@xxx.com. However, if the mail is sent within the Domino Domain it comes through as Charlie Brown. I believe all that the internet convention does is set the Principle field to the Dr. Brown. I could do this by modifying the Mail Template but I really don’t want to go there.I can’t believe that this can not be done, but then.