After Google's recent acquisition of Postini, they are rolling out policy management and message recovery by Postini to Premier Edition administrators at no additional charge.
Here are some description from their product description page:
Policy management lets administrators implement rules for how messages are handled based on the sender, recipient, attachments or content of the message:Premier Edition administrators can activate these new features from the Google Apps control panel.
Message recovery allows you to search for mail across your whole domain and recover deleted emails on a 90-day rolling basis.
- Messages can be selectively tracked, routed for review or blocked according to company or regulatory compliance guidelines. For example, emails with specific keywords can be prevented from being sent to external recipients, or groups of users can be entirely prevented from sending external email.
- Configurable spam and virus filtering lets organizations add custom filtering rules, complementing the spam and virus protection already included in Gmail.
It would be great if message recovery is available for normal Gmail users. ;)