1) Open Outlook Express

2) Click on the "Tools" menu, up at the top of the screen. (figure. 1)

Figure.1 - Main Outlook Express Screen

3) Click on "Accounts..." (figure 2)

Figure.2 - The Tools Menu

4) This will pop up a new window. On here, up at the top, click on the "Mail" tab. (figure 3)

Figure.3 - Internet Accounts

5) Highlight (click on) your mail account, then click on the "Properties" button. (figure 4)

Figure.4 -Internet Accounts - Mail Tab view

6) This will pop up a new window. On that window, up at the top, click on the "Servers" tab. (figure 5)

Figure.5 - Click on the Servers tab

7) On this screen, click on the check box titled "My Server requires authentication". If it's already checked, leave it that way. (figure 6, number 1).

8) Click on the Ok button (figure 6, number 2), and then the "close" button on the accounts window.

Figure.6 -Clicking the authentication box