have a friend with iPad 2 problems with hotmail. When she presses mail icon it immediately closes. Has been working in the past, no problems with her iPhone 4s.
I have e-Mail from 5 or 6 different address and ISP's, including G-mail and Hotmail and have tried using the apps from the app store but always come back to the stock mail app that came on the iPhone. It does what I need, is easy to set up and I have never had a problem with it since my first iPhone 3G.
I have tried the non-stock e-mail apps on both the iPad and iPhone but still feel that the stock Mail app on both devices has the features I need and is the easiest to use.