You have an Exchange Server 2010 organization.
You deploy an Edge Transport server.
You need to implement a message hygiene solution that meets the following requirements:
Users must be able to receive e-mail from external recipients who have been added to their Safe Senders Lists
The Edge Transport server must block all e-mail sent to invalid addresses inside the organization
What should you do first?
A.
Enable sender filtering.
B.
Create Send connectors.
C.
Configure real-time block lists (RBLs).
D.
Configure EdgeSync synchronization.