When you do /mail read, sometimes you'll see what someone has said, but not logged in for a while so you won't know when it was sent. This has happened to me quite a few times and it could be something important. So you would know whether to get back to the person or not. So I just thought it would be a handy touch if you could add a date/time of when a mail was sent. It would be something small but useful. Tell me your thoughts/improvements below!