YouhaveanExchangeServer2010organizationthatcontainsfiveHubTransportservers，fiveMailboxserversandoneEdgeTransportserver.Youneedtoprovideasolutiontoensurethatuserscanpreventlegitimateinbounde-mailmessagesfrombeingclassifiedasspam.Whatshouldyoudo？（）
A.Enablesenderfiltering.
B.EnableSenderIDfiltering.
C.ConfigureacustomMailTip.
D.Configuresafelistaggregation.
参考答案：D
