I finally said goodbye to my beloved Snow Leopard last week and upgraded to El Capitan (did a fresh install on a new drive). It's a whole different world, but I'm getting there. I also decided to change email clients. I have always used Outlook but want to switch to Apple Mail now. I have it set up, all is working fine, but I keep getting the annoying "are you sure?" warnings when I want to empty the Deleted Items folder. I already unchecked the boxes in Finder's Preferences (Advanced tab) and that made the warning go away for Finder's, but not for Mail's trash can. Anybody any ideas how to disable it in Mail?