Entering our encryption cluster IP range into the inbound gateway section of your Google Apps Control Panel.
1) Point your browser to admin.google.com. The URL redirects you to the Google accounts sign-in page.
2) Enter your super administrator account email address (including username and domain) and password. (If you are not an Administrator, you will be redirected to the user hub. The user hub provides quick access to the Google Apps and services they have permission to use, but will not allow access administration features. You will need to contact your Google Apps Administrator)
3) Click Sign in. The Admin console appears.
4) Scroll down to the Inbound gateway section. In the Inbound gateway text box, enter the IP range that was provided to you by your deployent coordinator. This can usually be found in the "welcome e-mail message" that you received. Be sure that you DONOT check the box described as "Only let users receive email from the email gateways listed above."
5) Save changes.