Ah, I didn't understand that you wanted to use category information from the
contact, not the message.
Outlook is not a relational database and doesn't support what you want out
of the box. You'd have to write code to look up the contact, get the
contact's category, apply that category to the message -- and then automatic
formatting would work.
--
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers