iPad email blank then disappears
Mail fine on iPhone, Safari fine, tried deleting and adding, rebooting. Opens, no content and closes cannot see any emails
iPad 2
Force close mail and then reset th iPad. This might not work and you might have an email that is causing the problem. I know its working on the phone but unles the phone and the iPad are set up EXACTLY the same way, a corrupt email could be causing problems on one device and not the other one.
First force close mail.
Force an app to close in iOS - Apple Support
Now reset the iPad. Not restart, reset it.
Restart or reset your iPhone, iPad, or iPod touch - Apple Support