You have an Exchange&e

You have an Exchange Server 2010 organization.  You need to plan a message hygiene solution that meets the following requirements： .Spoofing must be minimized .Open SMTP relays must be added to IP block lists automatically  What should you include in the plan？（）

• ASender ID filtering and recipient filtering
• BSender ID filtering and sender reputation
• Csender filtering and recipient filtering
• Dsender reputation and recipient filtering