If you already have a caisct.net FirstClass accout, you can log in via the web:  here. If you are new to caisct.net, follow these three steps: 1.  You can download a version of FirstClass client from here. 2. Click on the setup button on the login screen and put in the caisct.net server (see figure below) 3.  Log in using a username and password you chose and follow the auto-registration instructions.