Configuring Windows (Vista) Mail
To open Windows (Vista) Mail, go to Tools menu and select "Accounts"...
Click the "Add..." button
Make sure "E-mail Account" is selected and click on the "Next" button
Enter your Display Name. (This is your full name as you would like it to appear when you send messages to other people.) Then click "Next".
Enter your full E-mail Address. Then click "Next".
Within the "E-mail Server Names' screen:
Select POP3 from the list of server types
Enter pop.3rivers.net in the "Incoming Mail Server" field.
Enter smtp.3rivers.net in the "Outgoing Mail Server" field