If you are using Outlook 2007, you may find the following step by step instructions of use.
Click 'Tools' (on the toolbar), then 'Account Settings' (from the subsequent drop down menu)
Click the 'New...' button in the Account Settings window
Select the radio button for 'Microsoft Exchange, POP3, IMAP, or HTTP' and press 'Next'
Check the box labelled 'Manually configure server settings...' and press 'Next' button
Select the 'Internet E-mail' radio button and press 'Next'
Enter your name in the 'Your Name' box provided, in the form that you would like the recipients of your mails to see
Enter your email address firstname.lastname@example.org in the 'E-mail Address' box
Select 'POP3' in the account type drop down menu
Enter the Incoming Mail Server as shown in the table above in the 'Incoming mail server' box
Enter the Outgoing Mail Server as shown in the table above in the 'Outgoing mail server (SMTP)' box
Enter your email address (email@example.com) in the 'User Name' box
Enter your password in the 'Password' box
Ensure that the 'Remember my password' box is ticked
Press the 'More Settings...' button, and go to the Outgoing Server tab. Tick the box which says 'My Outgoing Server (SMTP) Requires Authentication', and then click 'OK'.
Click 'Next' and then 'Finish'