How can I delete my yahoo mail account?

HELP, please!!! How come someone can delete an e-mail from one's yahoo account while the person in is in their?

• account at the moment? So, I was reading and answering to a question an hour or so ago when I incidentally looked up and there was a red mark where it says "mail" and "1" was written. I'm not quite good at this but I figured out this meant I had one unread message in my inbox. Bad thing is I signed out of yahoo answers and signed in to my mail, during which time the new message had already vanished, the latest one being from about 2 hours before. You can imagine I got REALLY PISSED OFF! Trouble is, I had actually been expecting something important for a few days. Of course, I don't know what the deleted message was or who wrote it, but it may well have been the one I've been waiting for... I've never told my password to anyone. Besides I change it pretty often. Should I give up on Yahoo altogether?

• Answer:

  I get that little red 1 appear all the time too, and I don't have a yahoo email address, so I reckon it's just a glitch. It disappears after a few seconds. The only way to test it is to send yourself an email from another account and see how long the 1stays there till you open it.