Change the "you've got mail!" icon to a clickable button please. Every single new player that logs on asks why the button doesn't work. It is, after all, right next to 3 other buttons that are clickable.
I'm not saying that it shouldn't require going to a mail box. I am saying that there should be a popup notification stating that you need to go to one, and maybe even showing a picture of it next to the notice board in Eldevin City.
If you want to get fancy, maybe even use that pathing arrow that's in the opening scenario after character creation to map a path to the closest mail box (it's already in the game, right?).
At present, new players just assume that it is broken.