1) In the Menu bar, select "tools" and then "accounts" (98/00). Or, "e-mail accounts" (Win XP)

1) In the Menu bar click on "tools" and then "accounts"
2) Click on "add" and then "mail"
3) In Display Name, type your name. Click "Next"
4) E-mail address: enter yourname@yourdomain.com Click "Next"
5) My incoming mail server is a "POP3".
5) Incoming Mail (POP3 or IMAP)server: Enter your domain.com
6) Outgoing Mail (SMTP) server: Enter yourdomain.com
7) Click Next
8) POP account name: User Name Password: Your Password Click "Next".
9) Internet Mail Account Name: Your can name this whatever you would like. It can always be changed later
10) Choose your connection type depending on your connection method.
11) Click "Finish"