Click on the link to find the page for the first class download.

http://web.dsbn.edu.on.ca/

 After you install it on to your computer you will have to change the server.  Double click on the icon. Click advanced in the bottom left hand corner. Then click setup on the right hand side. Change the server domain to fc.dsbn.edu.on.ca and click save. You should now be able to access the first class webmail by entering in your login and password from the school computers.