I can't get email on my iPhone but it was fine before 6-4-13?

I can't get email on my iPhone but it was fine before 6-4-13?

If you have a PC download icloud.com, or just use your browser if you prefer. Login and password details are the same as your iphone. This should allow you to view your emails and look where the problem lies. There's a help option. Or delete the account and set up a new one.