when I click on mail it no longer opens to my accounts and the quit mail, is greyed out and will not allow me to quit mail
when I click on the postage stamp app to open mail,it does not launch, the mail bar opens, and when I try to quit mail it will not quit.
does anyone have any suggestions. It worked fine until today
MacBook Air (13-inch Mid 2013), OS X Mavericks (10.9)