How to delete 18,000 messagtes in my inbox for my yahoo email?

I have almost 18,000 emails in my inbox in my Yahoo, what is the quickest way to delete all of them?|||You can delete them all with just one click in the new mail, click All new Mail at the top of the mail screen, after it loads click More Actions, then click Select all, then Delete. If you are unable to load the new mail, then you will need to do this page by page in the classic mail. Click Options on the mail screen, then go to Results per page, click the number in the box, on the drop down you can now choose up to 200 per page, click Save Changes. Return to and click inbox, scroll to and click Check all, then delete. Then go to the next page. Don't forget the trash, or just leave it and Yahoo will empty it. You can change the number per page any time you want.|||Click "mark all" then click "delete"|||check box that says delete all and delete 'em|||mark one as spam and 66% should go away.|||thers no really good way....you just have to click mark all and delete hundreds of lists of emails|||Go to options and change the mails per page to 500. Then you can delete them in much bigger batches..