Earlier versions of Outlook Express should have similar setup steps.

Go to Tools -> Accounts

Click on the "Mail" tab and click on Add -> Mail...

Fill in your Name and click "Next"

Fill in your email address that you have with us.

Leave your incoming mail server as a POP3. Fill in your incoming and
outgoing mail
server mail.yourdomain.com (yourdomain.com is your your domain name with
us)Click Next.

Fill in the information about your email account. Your "Account
name:" is your FULL EMAIL address with us.
Fill in your password and click Next.

Click "Finish" to finish the wizard.
You now must enable SMTP authentication.

Go to Tools -> Accounts

Click on the "Mail"
Tab and double click on your email account with us or highlight the email
account and click on Properties.

In the "Servers" tab, go to the bottom and and check "My
outgoing server (SMTP) requires authentication".

Click on the "Advanced" tab and change the "Outgoing mail (SMTP)" to port#:
2525
Click OK and finish out of
the settings dialogue. You are now ready to send and receive emails!