I installed the latest firmware today and email and everything was working fine but now the mail application will not even open. It says it is opening but never does. lf you try to check mail it just sits trying forever. Turning off and on doesn't fix it. Any ideas?

Ok, fixed it! I was slowly trying different things and hoping I didn't need a reflash. In the end a restore from a backup did the trick. Seems to be working again now.