Not sure who else is seeing this. I see one post about this on Apple Forums so-far... Exchange 2010. Mail on Mavericks started moving about 97% of all emails to a folder namesd Junk. *the native spam folder in Outlook/Exchange is Junk Email*. I could not get any work done as I was constantly checking/emailing/replying back to email out of this folder. On a PC, dragging all emails back to Inbox, it would just move them back out to this folder named Junk. I closed .mail Moved all email from Junk to Inbox. Waitied. It did not move the emails back to Junk. Deleted the Junk folder I don't plan to open up .mail until I see a *fix* posted.