What must be configured in order to prevent the session during the initial TCP communication?

An organization is receiving SPAM emails from a known malicious domain.

What must be configured in order to prevent the session during the initial TCP communication?
A . Configure the Cisco ESA to drop the malicious emails.
B . Configure policies to quarantine malicious emails.
C . Configure policies to stop and reject communication
D . Configure the Cisco ESA to reset the TCP connection.

Answer: B

Explanation:

https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118219-configure-esa-00.html