Why does screen blank and return to apps in tools when touching mail screen?

Touch malil scfreen.blanks and returns to apps in tools

I tried deleting the app but the phone won't let me.  I have a 16g card installed in this phone that is nowhere near full.

Hi Ed. Have you tried reinstalling the app? Looks like it is crashing, I'm also thinking you probably have maxed the memory/ram usage of your phone.

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