问题：

[单选]

You work as the IT professional in an international company which is named Wiikigo. You are experiencedin implementing and administering a network operating system. You are specialized in deploying servers，configuring Windows Server 2008 Terminal services and network application services，and configuring aweb services infrastructure. The Web Server （IIS） server role and the SMTP Server feature are installed ona server that Windows Server 2008 is run. Since you are the technical support， you are required to configure the new SMTP server so as to forward mail to the mail server of the Internet Service Provider（ISP）.
Which action should be performed to achieve the goal？（）

A . To achieve the goal， the SMTP delivery setting should be configured to Attempt direct delivery beforesending to smart host.
B . To achieve the goal， the smart host setting should be set to use the local host.
C . To achieve the goal， the smart host setting should be set to use the mail server of the ISP.
D . To achieve the goal， the appcmd /delivery method：PickupDirectoryFromIis command should be run.