Double-click the Outlook Express icon.
From the File menu, click Identities , and choose Add New Identity .
In the Type your name field, type the username or name for this mailbox
Check the box next to Require a password if you would like to set a password for your identity.
In the New Password field, type in a password for your identity.
In the Confirm New Password field, type in the password again
Click the OK button.
Click the OK button.
Note: You can repeat these steps if you have multiple mailboxes.