Step 1: With Mac OS X Mail Client open, from the Mail menu, select Preferences.
Step 2. Select the Accounts option at the top of Preferences.
Step 3. Select your existing e-mail account on the left hand side of the window.
Step 4. Click on the Account Information tab at the top. Your settings
should match the following information:
Incoming Mail Server: isp.cbcast.com
User Name: Your full e-mail address (with @cbcast.com)
Password: Your password
SMTP Server: mail.cbcast.com
Step 5. Click on the Server Settings button and your settings should match the following:
Server Port: 25
The box that says Use Secure Sockets Layer (SSL) should not be
checked
The Authentication method should be set to Password
User Name: Your full e-mail address
Password: Your password
Step 6. Click OK on the Outgoing Mail Server settings dialog. You will then return to the main account settings dialog.
Step 7. Next click on Advanced at the top.
Step 8. The box at the bottom that says Use SSL should not be checked.
Step 9. Make sure that the Authentication option at the bottom is set to Password.
Step 10 .Close the Preferences window and Save changes.