You have an Exchange Server 2010 Service Pack 1 organization named contoso.com.All users have the contoso.com e-mail address suffix. You discover that both anonymous and authenticated users can post content to a public folder named Folder1 by sending e-mail messages to folder1@contoso.com.You need to prevent all users from posting content to Folder1 by sending e-mail.What should you do?()
A. From Outlook Web App (OWA), modify the properties of Folder1.
B. From the Exchange Management Shell, modify the permissions of the default Receive connector.
C. From the Public Folder Management Console, modify the properties of Folder1.
D. From the Exchange Management Console, modify the properties of the Public Folder database.