97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項選擇題

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

微信掃碼免費搜題