What’s New in Exchange 2007 #5 of 15: The Hub Transport Server Role
Posted by our Guest Blogger Peter Bruzzese, author of Tricks of the Windows Vista Masters.
Similar to a Bridgehead server in previous Exchange environments, this role handles internal mail flow. It transfers messages to and from Mailbox servers in the local AD Site, Hub Transport servers in other AD Sites, and Edge Transport servers. It can also be configured to transfer mail to external messaging systems like internet mail in absence of an Edge Transport server or non-Exchange SMTP gateways.
When installed in an environment that has an Edge Transport server…
…the Hub Transport role will work hand-in-hand with the Edge Transport server. Messages coming in through the Edge Transport role will be passed to the Hub transport and vice versa. However, the hub transport role can be configured to perform most of the same features as the Edge Transport server including anti-spam with a little work.
Hub Transport servers use AD Site and Site Link information already existing in Active Directory to route messages.

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