As Site Administrator, you can add email aliases for your site. In addition, you and your users can add aliases for yourselves through the User Administrator control panel. You can manage all of the email aliases on your site through the Site Administrator control panel.
To add an email alias through the Site Administrator control panel:
The list includes both users and other aliases. The full name of the user is shown in parentheses.
Note: By default, the Forward To list above this field retains a selected name. If you are forwarding the email only to users outside the site, deselect the user in the Forward To list by pressing and holding the Ctrl key while clicking on the name.
Go to quick-start guide:
Set up your site's email services