What must be done to ensure clients cannot send unauthenticated email?

Examine the FortiMail recipient-based policy shown in the exhibit; then answer the question below.

After creating the policy, an administrator discovered that clients are able to send unauthenticated email using SMTP.

What must be done to ensure clients cannot send unauthenticated email?
A . Configure a matching IP policy with SMTP authentication and exclusive flag enabled
B . Move the recipient policy to the top of the list
C . Configure an access receive rule to verify authentication status
D . Configure an access delivery rule to enforce authentication

View Answer

Answer: A