Based on FilePro Version 16.2 - Copyright 2013-2017
Intuitive Saving
The FilePro email addin can read the subject of the recieved and sent emails to attempt to predict which file to save a particular email to.
To enable this option go into the settings Tab of the Email Addin
Now when sending or receiving emails and the save to FilePro prompt comes up, the email addin will try to detect, based on the items selected, where best to save the email.