Trailhead Support Center : Outlook 2000 - Adding An Account
Step 1:
 Open Outlook 2000. Click on Tools and choose Accounts.
Step 2:
 In the Internet Accounts Window, click Add and choose Mail.
Step 3:
 Type in your Name and click Next.
Step 4:
 Type in your email address and click Next.

Step 5:
 Choose POP3 as the incoming mail server. For the server names for both Outgoing and Incoming, type mail.domainname.com.

(Replace "domainname.com" with your actual domain name)
Step 6:
 Type in your full email address as your account name. Also type in your password and click Next.
Step 7:
 Choose your connection method and click Next.
Step 8:
 Click Finish on the Congratulations screen.
Step 9:
 Click Close to close out of the Internet Account window.
Step 10:
In Outlook, click Send/Receive. If you are unable to connect to the smtp server, your ISP may be blocking port 25 from 3rd party use. Contact your ISP if this occurs.