Re: Print Screen Function
It looks like that the key is broken on your pc. You can use the virtual keyboard for that. It is located in Accessories. The virtual keyboard has all the functions of regular one. You just have to use your mouse to perform print screen and it really works well to some extent. Just hit the print screen button on the virtual keyboard and then press ctrl + v on paint brush. The image will appear.
Re: Print Screen Function
There are some nice screen recorder software that can help you. They also offer you printscreen features. They are called as screen capture tool. You can download the same from web for free and use them to create image of your email. You can also try direct printing of the email through web access. Try to open the email on the pc and then try to print.