i opened mail and it kind of froze, it has been making that loading color wheel thing for 5 minutes now and it wont let me exit it. i tried restarting my macbook and when i tried opening it again it doesnt work. what should i do?
Find a file named com.apple.mail.plist in the Preferences folder and drag it to the Trash. Do this while Mail is closed/not frozen. Does Mail open now? If so, you'll have to manually re-enter all your settings.