I a HUGE Newton fan and i’m excited to be back. While Newton was unavailable, I used Polymail which is cool, but not Newton. It did have a feature where you could see all the files that someone has sent you for each correspondent. It could be something that possibly shows up at the end of every email you recieve from someone as dropdown to see all previous attatchments from a correspondent. It could easily be a lightweight data tree of the file names and ref to file on the mail server to then request. Very cool and helpful!