Email suddenly crashes and does force quit

Not an expert, but every time I've had any programs force closing it was due to something I had recently installed that was not "playing well" with other programs. I have been able to solve everyone of these types of problems by either stop using the offending program or actually deleting it. Finding the offending program is usually pretty easy. YMMV

 

I had this happen to me over the weekend. Had to delete out my corporate email account setting (go to Settings, Applications, Manage Applications, Press menu button on phone, Select Filter, Select Running, Select Email, the click the Clear Data button and Clear Cache button).

This will delete all email accounts and you will have to recreate them. Hope this helps as it solved my problems with the Foreclose when opening emails.