Outlook is similar to Outlook Express.
Go to 'Tools' -> 'Email Accounts' -> 'Add a new e-mail account' -> 'POP3'
User Information:
Your Name: [as you wish]
E-mail address: [you@yourdomain.com]
Server Information:
Incoming mail server (POP3): yourdomain.com
Outgoing mail server (SMTP): yourdomain.com or your ISPs SMTP Server settings.
Logon Information:
User Name: [full email address (example: you@yourdomain.com)]
Password: [email account password]
Log on using Secure Password Authentication (SPA) is NOT checked.
Click 'More Settings …' -> 'Outgoing Server' Tab.
'My outgoing server (SMTP) requires authentication' IS checked.
(use same settings as…) is checked. (NOTE: not all ISP allow you to use SMTP servers that are not their own, so you may be required to use the settings for sending email they provide.)
Click 'OK' and you're finished.