Unless you give e-mail, it sounds like the best option would be a bulitin board like this one where each message would appear as a link and the link changes colour once clicked. Not sure how you would get the notification of new messages though.
Alienware 17 R4 2017 review
These brilliant Lego posters show just what children's imaginations are capable of
Mac power user tips and hidden tricks
Comment réinitialiser votre PC, ordinateur portable ou tablette Windows ?