You can delete all of your emails on Yahoo Mail using "Select All" repeatedly, or you can use the "Clean your Inbox" tool to ...
You can delete folders in Yahoo Mail right from your inbox's left-hand sidebar under the "Folders" label.
You delete a mountain of old newsletters, sweep them into Trash, and hit Empty. For a blissful moment, the folder looks clear. Then, bam, messages reappear like socks after laundry day. If Yahoo Mail ...