Is there a way to mass delete everything? I have tried altering my reading pane but can only get the first 20 or so emails to show at once and deleting 2000+ emails that way would take forever.

Do Yahoo.com email accounts have a mail filter setting? If so, can I set it to shift all the daily emails to one folder (that I can delete later) and will the filters work on any unread emails or just on new ones?

Any info or other suggestions would be appreciated. Thank you