While trying to set up moved to main menu/dsktop then trash. Can I retreive? or reinstall?
It's still installed. Pull up the application drawer, scroll to Corporate Email, long press it, and you will be able to place it on any home screen you like. No worries. You just deleted a shortcut, not the underlying application.
A gun in the hand is better than a cop on the phone.
Only the Skilled Survive
A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
Drill Sergeant Frick's Rules For Un-armed Combat.
1. Never be unarmed.
2. See Rule #1
USMC rule # 23 of gunfighting: Be polite, be professional, but have a plan to kill everyone you meet.
I agree. Try a restart. Folks have had to go to (relatively) extreme measures to delete that application and, since it sounds like you are just setting up your phone, I doubt you've gone that route (rooting the device, etc., etc.).