Many organizations have legal, regulatory, or internal requirements to filter, process, and store e-mail that is between users in the organization. Additionally, many organizations have additional requirements for how to handle mail sent to or from the Internet. A collection of Transport Policy and Compliance agents in Exchange 2007 helps organizations more easily comply with these legal, regulatory, and internal requirements by providing ways to configure rules and settings that help you meet these requirements.

The following Transport Policy and Compliance agents are available in Exchange 2007 and run on the Hub Transport server role:

• Transport Rules agent   This agent enables organizations to create rules based on conditions, exceptions, and actions. Conditions apply to users, distribution lists, and message contents. Exceptions let you exclude specific users, distribution lists, or SMTP connectors. Actions define what happens to a message under which conditions and exceptions, including redirecting, returning, sending to an alternative recipient, and deleting the message. Rules that are defined on the Hub Transport server are applied to all users in your organization and to all messages sent and received by users in your organization.
  
  
• Journaling agent   This agent provides your organization with a method of recording some or all e-mail messages that are sent or received by any user in your Exchange 2007 organization. You can scope journal rules to record messages that are sent and received by users inside the same organization, to record messages that are sent to or received from the Internet, or to record any message that passes through a Hub Transport server during transport.
  
  

For more information, see the following topics:

• Transport Architecture
  
  
• Transport Policy and Compliance Agents