试题详情
- 单项选择题You have an Exchange organization.All servers in the organization have Exchange Server 2010 Service Pack 1 （SP1） installed.You need to prevent external organizations that do not have sender policy framework （SPF） records from sending e-mail messages to the organization. What should you configure？（）
A、sender reputation
B、sender ID filtering
C、an IP block list provider
D、sender filtering
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