How to make the emails go away?

I have an iPhone 5s i synced an email address to it, everytime i delete messages from the inbox they reappear as unread within ten minutes, why and how could they think I would want this to happen? And short of simply forgetting about using the iphone for emails how can I make it stop.

Please don't say use advanced settings, they do not exist on the latest ios

Somewhere there should be a tick box saying "delete from server" in the setup.

You might want to turn off your mobile mail app, and go from there