【单项选择题】
You work as a network exchange administrator at Company.com.the Company.com network currently consists of a single active directory forest containing a single domain named Company.com.the Company.com organization makes use of microsoft exchange server 2010 as their messaging <br /> solution.Company.com has recently deployed a computer named -ex01 which has the client access， hub transport and mailbox server roles installed.during the course of the business week you receive instruction from Company.com to ensure that the network users are able to send and receive e-mail using windows&
A、A.You should consider having the properties of the MSExchangePOP3 （TCP-in） Windows Firewall rule modified.
B、B.You should consider having the properties of the MSExchangeMailSubmission -RPC （TCP-in） Windows Firewall rule modified.
C、C.You should consider having the SMTP server feature installed and configured.
D、D.You should consider having the Microsoft Exchange POP3 service started.You should then have the startup type set to Automatic.
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