Mac.com account Offline in Mail - Gmail Accounts Fine - I changed Nothing

So my mac.com email account has been offline in Mail for about 24 hours.

I can get and receive mail for this account when I check it online.
My other email accounts are online.

I tried deleting the account and adding it again as a POP, but got the message that the MobileMe POP server was "not responding."

With IMAP I get the message "The MobileMe IMAP server 'mail.mac.com' is not responding."

The only thing new I've done since this problem began is I installed Torrent client, Transmission and used it a little. However, I didn't change any settings in either program.