After updating my imac to the 10.9.2 my email keeps "quiting unexpectedly" and suggestions?

Question

i down loaded the 10.9.2 on my OSX imac. Now my email keeps "quiting unexpectedly". My email is through my local internet supplier which i have contacted and the say my internet is working just fine. i need some help getting my email back so i can acess my new and old emails. thanks u

Answer 1

Do a backup.
Quit Mail.
Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J.  When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Go to Library/Containers/com.apple.mail.  Move the folder com.apple.mail to your desktop. You must move the entire folder, not just the contents.
Restart, re-launch Mail and test. If the problem is solved, recreate any required Mail settings and import any emails you want to save from the folder on the desktop. You can then put the folder in the Trash. If the problem remains, return the folder to where you got it replacing the one that is there. 
Information learned from Linc Davis. Thanks to leonie for some information contained in this.
Crashes/quits unexpectedly