How do I delete my entire inbox and start from scrath again?

DELETE ALL EMAILS IN YAHOO CLASSIC: First, expand your email page to show and delete more at a time enabling you to delete more at a time. 1. Click Options, Mail Options. 2. On the General page that opens, go down to "Message Results per page". 3. Click the blue down arrow and select 200 (maximum) message results on each page. 4. Most important, go to the top left of this page and click on the Save Changes icon. 5. Go to your In-Box. Click the "Sender" box at the top left to place a check mark in all of the boxes on the first page. Go to the top of the page and click the delete button. Do the above for each page.