An engineer is configuring a Cisco Email Security Appliance (ESA) and chooses "Preferred" as the settings for TLS on a HAT Mail Flow Policy. Which result occurs?.

An engineer is configuring a Cisco Email Security Appliance (ESA) and chooses "Preferred" as the settings for TLS on a HAT Mail Flow Policy. Which result occurs?.
A . TLS is allowed for outgoing connections to MTAs. Connection to the listener require encrypted Simple Mail Transfer Protocol conversations
B . TLS is allowed for incoming connections to the listener from MTAs, even after a STARTTLS command received
C . TLS is allowed for incoming connections to the listener from MTAs. Until a STARTTLS command received, the ESA responds with an error message to every command other than No Option, EHLO, or QUI
E . TLS is allowed for outgoing connections to the listener from MTAs. Until a STARTTLS command received, the ESA responds with an error message to every command other than No Option (NOOP), EHLO, or QUI

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Answer: D