Mail notification & SHIFT + click not working

[lovswr]

Hello, I am a new player to WoW & just recently found this wonderful interface.

I have looked but I do not see where one is notified of new mail in the interface. Is there some setting that I just overlooked or is it hidden in some way?

Also, of more import to me, after installing the nUI interface, SHIFT + mouse click is not working in regards to separating items. That is to say, I can no longer grab just one item of a stack of 3 or 10 or 20. I can only get the whole stack. This is very frustrating when using my guild bank & the like.

Again, I am new not just to this interface, but WoW in general, so it may be some common knowledge thing. In either case, TIA.