Hi, small feedback, I have the "Inbox not recognized" bug, too.

I have a old ovi account, transfered now to the hoster yahoo. Only for your information.

So, to nail down this bug: I have the german language settings set on my N950.
And at the Mailclient appears a empty Folder "Eingang" - the german translation of "Inbox". I'm unable to mark this folder with a star, so it is perhaps a special folder. But I have no such Folder hat the IMAP server. There the folder is called "Inbox" and I'm able to access this Inbox Folder at your Mailclient without problems. But it is accessed like any other folder - and I'm able to favourite it.

Additionally to my Folders on the Server I have several other empty german Folders like "Ausgang".

So I guess this is a translation problem. Perhaps the "Inbox" is somewhere translated where a translation will cause a bug.

Hope this helps. Keep on the good work!