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.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.