Sounds good in general. But I have to "clean" a lot of folders of my 10 users. When all affected mails are being moved to the user's inbox again, I have to sort them subsequently and manually to the original folders back. That's a lot of work.
Background: In Germany we have to store all business related conversation for up to 10 years. To avoid huge incoming folders I create "year" folders for every new year where read mails are automatically being moved to. Once a year I maintain the older folders of the last years for removing big attachments.
I would wish a tool where I could select a folder and set an attachment size which should be searched and removed for all mails inside this folder.