Google Postini Message Security Using Postini with Google Apps Education Edition - Manual (Page 13)

Using Postini Message Security with Google Apps Education Edition 13
Create a Filter to Help Limit Outbound Messages
Content Manager can be configured to help limit students from sending messages to users
outside of your domain. However, at this time, outbound messages sent to external users can
bypass the Content Manager in two cases:
• A user sends a message to multiple recipients and includes both internal and external
users on the “To” line of a message.
• A user includes an external recipient in the “Bcc” line of a message.
To help limit outbound messages, follow the basic steps for configuring Inbound Content
Manager with two changes:
• To enable Outbound Content Manager: In the Organization Management page, under
Outbound Services, click Content Manager, then follow the steps to configure.
• When creating a filter for Outbound Content Manager, set up the filter to check the
recipient (instead of sender) field in step 6:
• Location: The part of the message to scan. Choose “Recipient”.
For more information on how Content Manager works and additional uses, see the Content
Manager chapter in the
Administration Guide .