Solution:

1. In the browser enter http://www.domainname.ext:8383
2. Login using the admin username and password.
3. After you have logged in, Expand the Administrative Account Options list box.
4. Click on the Alias administration.
5. Click on Add.
6. Enter the Alias Id as nobody.
7. Select the Alias Type as Standard.
8. Enter the destination id. (This is the account on which all the emails will be caught).
9. Click on save.