I would like to see a Filter to Auto-Delete/Trash emails from certain sources like say a specific retailer(s) after a certain number of days. Or a sweep box that I can filter certain emails to that will auto delete after some period I can control, like 30 or 60 days.

I can only imagine the terabytes of old sales emails from various retailers stuck in yahoo mailboxes that noone will ever bother to delete. For example, I recently found an old Lands End sales email from almost 20-years ago still unread in my inbox. These are no bueno after some indeterminate period due to various factors. But, they will hang out in my inbox virtually forever. Give me an easy, controllable way to have them auto-delete.

Can you even imagine the resources this would save?? I know I can.