You have an Exchange Server 2010 Hub Transport server named Hub1. You install an application on a third-party server named Server1.  You discover that the application cannot authenticate to remote servers.  You need to ensure that the application can relay e-mail messages by using Hub1.  What should you do？（）

• A、.Create a new Send connector.Add the TCP/IP address of Server1 to the Send connector .Modify the permissions for the Send connector
• B、.Create a new Receive connector.Add the TCP/IP address of Server1 to the Receive connector .Modify the permissions for the Receive connector
• C、.Add the TCP/IP address of Server1 to the default Receive connector .Create a message classification.Create a transport rule
• D、.Add the TCP/IP address of Server1 to the Client Receive connector .Create a remote domain.Create a transport rule