Is this a joke? You tried to delete some folders by typing the word Delete?
What email program do you use? If you're in Outlook or Outlook Express, go to Tools - Accounts. On the Email tab, find your account and click Edit. On the page that opens up, look for Name or Account settings where you might have typed Delete. Also, if you have the More Settings button click that, and then go through each tab looking at the account names and values where you may have inserted the word delete.