Applies to: Exchange Server 2007 SP3, Exchange Server
2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007
Topic Last Modified: 2006-11-13
The Microsoft Exchange Server 2007 Hub Transport server role is deployed inside your organization's Active Directory directory service. It handles all mail flow inside the organization, applies organizational message policies, and is responsible for delivering messages to a recipient's mailbox. Hub Transport servers provide the following functionality:
- Mail flow The Hub Transport server role
processes all mail that is sent inside the Exchange 2007
organization before it is delivered to a recipient's Inbox inside
the organization or routed to users outside the organization. There
are no exceptions to this behavior.
- Categorization The categorizer performs
recipient resolution, routing resolution, and content conversion
for all messages that move through the
Exchange 2007 transport pipeline.
- Routing The Hub Transport server role
determines the routing path for all messages that are sent and
received in the organization.
- Delivery Messages are delivered to a
recipient's mailbox by the store driver. Messages that are sent by
users in your organization are picked up from the sender's Outbox
by the store driver and are put in the Submission queue on a Hub
Transport Policy and Compliance
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
- 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.