Maybe also a way to identify mailing lists by

in the subject field and propose a folder with same name for reception.

 

Well in fact, maybe make

in the subject field a right-clickable area with "Create folder" and then "Move to folder" option.

 

Maybe also make "Create rule to receive in dedicated folder" a right-click option for sender, and other specifications.

Just two very tiny improvements to the Filter wizard :

1) In the window for chosing a folder, add an ok button. Not everybody will understand that double-click is necessary. 

2) remove the last page of the Filter wizard. I shouldn't have to click on ok to something that announces me that I just did what I wanted to do and that I need to click on Close to... close. I find it a nuisance. The Finish button on previous page should be the end.