I have a pop email account with my ISP on my iPad along with an iCloud email. My mailboxes recently began showing huge numbers of unread mail and my available space was down to very little. I cured that by deleting my pop mail account then re-establishing it. Sadly that created another problem. I now have extra Sent, Spam and Trash folders after the usual ones. They are empty and serve no purpose. I cannot delete them. I click to edit and select each but the only choice offered on the edit page is "delete account". I hit that but the folder remains. Is this a bug? Is there a cure?