Before limiting your incoming mail to only your domain, you may want to add certain senders to the Senders Lists, which bypass the inbound Content Manager filters. Approved senders typically include:

• Trusted partners or organizations. For example, another school or group that you want to allow to send messages to your students.
• Automated email notifications sent by Google. For example, your Google Calendar appointment reminders or Google Site update notifications.

To set up Approved Senders, follow these steps:

1. Access the Administration Console:
• Log in to Google Apps using your administrator account.
• On the Google Apps dashboard, click Postini services.
• Click System Administration.
  
2. Go to Orgs and Users > Orgs, and then select the organization that has your students (not your staff or faculty). In this procedure, this is your Users organization.
   
   
3. On the org’s Organization Management page, scroll down and click Sender Lists.
   
   
   
   
   
4. On the Sender Lists page, enter the Google notification addresses and your trusted sender addresses or trusted domains that apply for all users in this org, in the Approved Senders field, and click Add.

Approved senders addresses for Google notifications:

Notification	Address
Google Calendar reminders	calendar-notifications@google.com
Google Sites updates	noreply@google.com

WARNING: We strongly recommend that you do not add your own domain/addresses or popular domains to the Approved Senders list. Spammers routinely spoof these domains to bypass the message service filtering. Also, the service's anti-spam heuristics can recognize legitimate messages from popular domains and minimize any false positives.

For more information on Senders lists, see the Approved and Blocked Senders chapter in the Administration Guide.