I’ve had several questions the past couple of weeks looking for a prompt to select a folder when sending messages. This is a popular feature in Lotus Notes but while Outlook allows you to set a Sent items folder for every message you send (overriding the Sent folder) it doesn’t pop up a dialog – you need to remember to select the folder before hitting Send, or use a macro to bring up a dialog.
If you use rules to move messages as they arrive, Outlook has an option to save replies in the folders with the originals.
See “Choosing the folder to save a sent message in” for a link to the macro and more information
http://www.slipstick.com/mail1/file_sent_message.asp