What should you use to correct this?

You are the Enterprise Administrator of an Exchange Server 2010 SP1 organization.

Your server is responding to SMTP requests with the address cas1.contoso.com when it should be mail.contoso.com.

What should you use to correct this?

A.
Set-TransportServer.

B.
EMC Hub Transport rule.

C.
EMC Hub Transport Properties.

D.
Set-TransportConfig.

E.
Set-TransportAgent.

F.
Set-ReceiveConnector.

Explanation:
This should be: Set-ReceiveConnector -Identity -FQDN mail.fabrikam.com

It’s unlikely, but it could also be to do with the banner, so: Set-ReceiveConnector “From the Internet” -Banner “220 Contoso Corporation”

Reference:

http://social.technet.microsoft.com/Forums/en-US/exchange2010hosters/thread/86d80ab2-c45a-4d93-b641-d623cde53e81

Banner Reference:

http://technet.microsoft.com/en-us/library/bb124740.aspx