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Exchange Server 2007 provides new tools for coping with a growing number of legal, regulatory, and internal policy and compliance requirements that relate to e-mail. Most organizations must be able to filter e-mail delivery based on several different criteria and manage e-mail retention and deletion. This funcast provides details on how to configure the Exchange Server 2007 e-mail policy and compliance features.
Messaging policies in Exchange Server 2007 are a set of rules and settings that apply restrictions for message flow and message storage. You can use messaging policies to apply rules to messages in transport and to enforce retention requirements for messages stored in user mailboxes. Messaging policies can be created on Exchange Server 2007 computers running the Edge Transport server role, the Hub Transport server role, or the Mailbox server role.
Curious howto implement the messaging policies? Watch this funcast presented by Ilse van Criekinge MVP Exchange Server - ProExchange
All this to make accurate decisions quickly.
Maybe just a small note, that there was problem with the sound recording during my funcast, and that's the reason I sound so strange ;-)