Bodestone
Android Enthusiast
This is what the stock email app looks like.
Do you have the white Note 2 by any chance? I wonder if they themed the mail to match the shell?
Either that or it's a US operator mod and not pure Samsung? I've certainly looked everywhere for some kind of setting.
The closest any combination of keywords in google comes to an answer is this post.
Edit: Another thought. When you are in the settings menu are they the same colour as the email app? I just wondered if that had been changed too.

, but after a lot of messing about i have now gone over to using profimail (i had it on my htc desire so just transferred the licence over) , its not ideal but there is a new version due very shortly, but this has a white theme as standrad but with some tweaking that can be found on their forum you can change it to black so im happy now, plus it uses push notifications so was a lot faster than using the samsung app that polls every 5 minutes, i did try messing around setting up microsoft exchange server on the samsung email app but just couldnt get it working right, i couldnt find deleted emails and all the emails i did delete still came through on my desktop pc via outlook, anyway im not going down that route again, just looking forward to profimail version 4 