Using Microsoft Outlook

Step 1 - Goto Tools | Accounts
Step 2 - Click on Add | Mail
Step 3 - In Display Name, type whatever you want. Click "Next"
Step 4 - E-mail address: whatever@[yourdomain].com Click "Next"
Step 5 - My incoming mail server is a "POP3".
Step 6 - Incoming Mail(POP3 or IMAP)server: [yourdomain].com
Step 7 - Outgoing Mail(SMTP) server: [yourdomain].com or what your ISP provided you.*
Step 8 - Click Next
Step 9 - POP account name: [username], Password: [passwd] Click "Next".
Step 10 - Internet Mail Account Name: whatever you want
Step 11 - Choose your connection type depending on your connection method. If using AOL, choose "Connect through ...LAN..." option.
Step 12 - Click "Finish"
 

Using SMTP Server:

Per dialup session, you would need to be authenticated to use the SMTP(Outgoing Mail) server. This is to prevent spammers from gaining access to your SMTP server. Here is how you can be authenticated:

Step 1 - Get connected to the Internet
Step 2 - Start your email software.
Step 3 - Make sure there is no outgoing mail in your outbox.
Step 4 - Log into the POP server to check your email
Step 5 - Now you are authenticated and you should be able to send and receive email w/o any problems. As long as you don't quit the program and stay connected to the net, you wouldn't need to be authenticated anymore.