Log in to your control panel.
Select the domain name that you want to apply the change to.
Click on MAIL.
Select the mailname that you want to modify.
Uncheck the "Redirect" box and remove the email address.
Check the "Mailbox" box.
Enter the new password and confirm the new password.
Click on UPDATE.
Now, email will start collecting on the server and can be downloaded to be read locally by your email program or read directly on the server using the IMP Webmail program.