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单项选择题 You have an Exchange Server 2010 organization. You deploy an Edge Transport server.  You need to implement a message hygiene solution that meets the following requirements: .Users must be able to receive e-mail from external recipients who have been added to their Safe SendersLists .The Edge Transport server must block all e-mail sent to invalid addresses inside the organization  What should you do first?()

A、Enable sender filtering.

B、Create Send connectors.

C、Configure real-time block lists (RBLs).

D、Configure EdgeSync synchronization.

  • D
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