I have three gmail accounts in Mail, and Mail gives me Gmail folders for email numbers 2 and 3. But not for email number 1?! What's going on here? How do I get Mail to show a Gmail folder for email account number 1? 
EDIT: I fixed it by using IMAP instead of POP on email account number 1.
EDIT: I fixed it by using IMAP instead of POP on email account number 1.
