To set up POP3 Microsoft Outlook Express:

Open Microsoft Outlook Express.

Go to Tools > Accounts.

Click the Mail tab to open a list of your mail accounts.

Click the Add > button and select the Mail item.

Enter your name as you want it to appear in any messages you send, and click Next >.

Type your e-mail address created through Plesk (for example, your.name@your-domain.com), and click Next >.

Select the protocol of your incoming mail server, POP3 or IMAP. (usually POP3)

Specify the mail servers incoming and outgoing (usually they are: mail.your-domain.com), and click Next >.

Type your e-mail address in the Account name box (for example: your.name@your-domain.com).

Type your password. This should be the password that you specified during creation of the mailbox through Plesk.

Leave the Remember password box checked, if you do not wish to be prompted to enter password each time your e-mail program connects to the mail server to check for new mail, and click Next >.

To complete setting up your e-mail program, click Finish.

Go to Tools > Accounts. Click the Mail tab and double click the account you just added (mail.your-domain.com)

Click the Servers tab, check “My server requires authentication,” and click the Settings button.

Click “Use same settings as my incoming mail server.”

Click OK, and OK again.