From the Tools menu, choose Accounts... This will open the Accounts Information Box. In the Accounts Information Box, click add > and choose Mail... This will bring up the Internet Connection Wizard, which contains five screens.

Screen 1: Your Name

Display name: Name you want displayed for this account
Click Next

Screen 2: Internet E-Mail Address

E-mail address: Your E-mail Address
Click Next

Screen 3: E-mail Server Names

My incoming mail server is a POP3 server...
Incoming mail (POP3 or IMAP) server: yoursite.com
Outgoing mail (SMTP) server: yoursite.com
Click Next

Screen 4: Internet Mail Login

Log on Using: Select
POP account name: Email Username
Password: Email Password

Note: Do not check "Log on using Secure Password Authentication (SPA)" as this is not used here.

Click Next

Once back at the Internet Accounts Box, Choose Properties.

Server Authentication

Choose the Servers tab. Under the Outgoing Mail Server section, place a checkmark next to "My server requires authentication".

Note: The default setting for server authentication is to use the same settings as your incoming mail server. Therefore, you will not need to change anything in the settings for server authentication.

Leaving a Copy on the Server

This is also on the Advanced tab. Under the Delivery section, place a checkmark next to "Leave a copy of messages on server".

Congratulations, you've now setup Outlook Express 4 to use your email account. Repeat the above steps to setup further email accounts.