Your network contains an Exchange Server 2010 Service Pack 1 (SP1) organization. The
organization has an Edge Transport server deployed in the perimeter network. The Edge
Transport server is subscribed to your Active Directory site.
You configure the Edge Transport server to copy email messages sent to the organization
from the Internet to a mailbox named Mailbox1.
You notice that email messages sent to non-existent users are not copied to Mailbox1.
You need to ensure that all of the email messages sent to the organization from the Internet
are copied to Mailbox1.
Which feature should you disable?

A.
Recipient Filtering

B.
Content Filtering

C.
Sender ID

D.
Sender Filtering