Q: Yosemite Mac Mail problems

I am user of mid-2010 2,4 GHz Intel Core i5, recently upgraded to OS X Yosemite.  Now whenever I try to use Mail, it closes within 5 seconds of opening.  Multiple solutions tried - removal of gmail, other IMAP mail accounts, cache removed via Finder, Yosemite reinstalled - no luck.  This is really annoying!!  Any suggestions from the community?  Would happily go back to Mavericks if I can!!!