I have a MacBook Pro 10.9.5 laptop. I tried to move 2 emails to the trash and they wouldn’t go. I clicked quit mail and then tried to shutdown. I get a window saying there was an error in moving emails to trash and then I get a window saying mail application wouldn’t let me shutdown. It said to try quitting mail and then try shutdown again. I can’t try quitting mail again because it is gray, meaning it’s unavailable.
How can I get rid of those two emails and get my mail to quit??