iOS 6.1 Mail App Bug?

I just updated my "iDevices" to iOS 6.1...But the thing is that the mail app doesn't load any more new emails anymore and what's worse, I can't send emails! However, other apps work just as fine as before. I tried resetting the mail app (turning it off on the multitasking tray and then opening it again) but it still doesn't work the way it's supposed to. Am I the only one who has this problem? 😟