Mail in Yosemite 10.10.3
After i Installed Yosemite version 10.10.3 , I am having tremendous problems with mail. it does nor open , and whenever utopians you do nt see the messages . This is very annoying. Can some one guide me on how to rectify this situation ?
MacBook Pro with Retina display, OS X Mavericks (10.9.2)