Hello!

I have a MacBook Pro running Mountain Lion OS, with a Mac Mail 6.6 (1510) client.  I have 7 email accounts set up on it, with 2 Gmail IMAPs, 4 POP3 accounts from various providers, and one @hotmail.com account, which was until a few days ago set up for POP3 (leave email on Server). 

I was thrilled to hear that Outlook.com has finally got IMAP available for email clients like Mac Mail, so I immediately deleted the Hotmail POP account in Mail (through System Preferences -> Mail, Contacts & Calendars) and then set up my Mail app to access Hotmail via IMAP as per your instructions elsewhere.  That's when the problems began..

My Hotmail Inbox has 3-4 sub-folders in it.  It started synchronizing all my folders, and got all the folders into Mail, except the Inbox.  (The sub-folders showed under the Mailbox name as click-to-expand arrows, and had mail in them, only to disappear on their own in 10 minutes) 

So I thought I did something wrong, and deleted this account as well, restarted the Mac and again set up the account - it downloaded more than 2500 messages (including sent, deleted, etc.), but didn't display them in the Mailbox.  This time, the Mailbox Inbox had no sub-folders, but the sub-folders appeared as individual folders along with Junk, Deleted, Sent, etc below.  However, when I restarted the Mail app - SUCCESS!  It showed all the folders, including the Inbox.  It then worked fine for 3-4 days whilst the Mac was on standby and Mail was not closed. 

Sending as well as receiving was working well, except I had the well-documented problem of mails deleted from Mac Mail app inbox not deleting from the Outlook.com server.  (Any updates on this front?)

But then, when I restarted the Mac today and launched the Mail app, again the Hotmail Mailbox is showing as empty. No amount or restarting the Mail app is bringing the mails back to show in the Mailbox.

Should I go back to POP?  Am I doing something wrong?  All the other accounts setup in the Mail app are working perfectly.