Most of us have email messages we’d like to get rid of forever from our inboxes. However, there are times you’ll delete an email only for it to show up among your messages again, leaving you dumbfounded. There’s a reason for this, and it has everything to do with your email setup. We’re going to explain whether deleting an email on an iPhone or iPad deletes it on the server, and how your setup affects the whole process. Email Protocols…