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单项选择题 You have an Exchange Server 2010 organization.  You need to plan a message hygiene solution that meets the following requirements： .Spoofing must be minimized .Open SMTP relays must be added to IP block lists automatically  What should you include in the plan？（）

A、Sender ID filtering and recipient filtering

B、Sender ID filtering and sender reputation

C、sender filtering and recipient filtering

D、sender reputation and recipient filtering

  • B

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