Your network contains an SMTP server that runs Windows Server 2008 R2. You need to ensure that
all mail for contoso.com is routed through a smart host named mail.contoso.com. All other mail
must be routed by using DNS name resolution. What should you configure?

A.
a new SMTP domain

B.
the Advanced delivery options

C.
the Messages options

D.
the Outbound connections options