Can't delete "Archive" mailbox added accidentally.

[Cergman]

I did something while erasing messages in mail, and this stupid Archive mailbox just appeared under the mailboxes section. I only have one email account in use in Mail, and that is my @me email. If anyone could help me out and let me know why I can't delete this archive thing, it would be very greatly appreciated. I can't drag it to the trash and clicking delete on the keyboard or command delete does nothing. I have attached some screenshots.

 

[Andydigital]

Sorry I don't have an answer for you but I suggest you ditch the crap default mail.app and get something like Postbox instead, it's a freaking awesome mail program with a really good knowledge base for when you get stuck, and it has a lot more features than the default app and it cost less than $10.