Well, it's been almost 10 years and we have yet to see this basic (but really important) feature implemented 😕
While it's technically possible to do right now using Sieve filters feature [ https://proton.me/support/sieve-advanced-custom-filters#managing-expiration ], not everyone is willing/able to learn the Sieve programming language just for this. So it should be added in the user-friendly manner to the "Add filter" UI or in the Folder settings
Well, it's been almost 10 years and we have yet to see this basic (but really important) feature implemented 😕
While it's technically possible to do right now using Sieve filters feature [ https://proton.me/support/sieve-advanced-custom-filters#managing-expiration ], not everyone is willing/able to learn the Sieve programming language just for this. So it should be added in the user-friendly manner to the "Add filter" UI or in the Folder settings