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MCITP 70-663 Exam Ref: Designing and Deploying Messaging Solutions with Microsoft® Exchange Server 2010 by Orin Thomas

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Objective 2.2: Deploy Edge Transport Server Role

As a component in an Exchange Server 2010 design, the Edge Transport role functions as a first port of call for inbound messages and a departure point for outbound messages. You primarily use this server role for the purpose of message sanitation. Message sanitation includes everything from ensuring that incoming spam doesn’t reach user mailboxes to ensuring that sensitive information isn’t transmitted to external third parties through email. Estimates suggest that up to 95 percent of email messages sent across the Internet are spam. Dealing with message sanitation on dedicated servers on the perimeter network ensures that Hub Transport servers on the organizational network do not become clogged ...

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