Auto purge folder option (mainly for spam/junk)

Annoying thing to empty spam/junk folder. Add option to delete messages on specific folders : 1. everyday, 2, every 30 days, 3. Custom date and 4. every time I close / open mailbird. If you make it generic than it may apply to any folder I chose which is better because each email aaccount have different names for spam folders (spam/junk, unwanted, etc.) also, I may want to empty my newsletter folders every 30 days.