You have an Exchange Server 2007 environment. You create a new distribution group named Marketing. Users in the Marketing distribution group report that they are not receiving messages that are sent to the group from the Internet. You need to ensure that the Marketing distribution group is able to receive messages from the Internet. What should you do?

A.
Configure the Message Delivery Restrictions properties for the Marketing distribution group to accept messages from All senders.

B.
Configure the Message Delivery Restrictions properties of the user accounts of the users in the Marketing distribution group to accept messages from All senders.

C.
Run the Set-DistributionGroup -Identity “Marketing” -RequireSenderAuthenticationEnabled $True cmdlet.

D.
Run the Set-DistributionGroup -Identity “Marketing” -RequireSenderAuthenticationEnabled $False cmdlet.