1. Open Outlook.
2. Click the Tools menu, and select Account Settings.
3. Click on the  Email tab and click on the New... button.
4. Next select Microsoft Exchange, POP3, IMAP or HTTP and click Next.
5. On the Auto Account Setup window check the Manually configure server settings or additional server types and click Next.
6. Select Internet E-mail option and click Next.
7. Fill in the following fields
8. Enter Your Name as you want it to appear.
9. Enter your full email address username@yourdomain.com in the Email address field.
10. Select POP3 or IMAP.
11. Enter mail.yourdomain.com in the Incoming mail (POP3, IMAP) server field.
12. Enter mail.yourdomain.com in the Outgoing mail (SMTP) server: field.
13. Enter your username username@yourdomain.com in the Account name field.
14. Enter your email password in the Password field.
15. Click on More Settings...
16. Click on the Outgoing Server tab.
17. Check My outgoing server (SMTP) Requires Authentication
18. Make sure Use same setting as my incoming mail server is also checked.
19. Click on OK.
20. Click on Next
21. Click on Finish