You would still need a rule to run the macro script. You could run it on all incoming mail. That isn't the problem here. The problem is that of identifying which folder to save the message to. You spent much time explaining the location where the message would be saved, but, as far as I can see, none explaining the layout of the message and what exactly the macro would be looking for in that message to establish how to direct the message to the target location. Can you post a sample message?