Which action is taken on a message when CRES is unavailable?

Email encryption is configured on a Cisco ESA that uses CRES.

Which action is taken on a message when CRES is unavailable?
A . It is requeued.
B . It is sent in clear text.
C . It is dropped and an error message is sent to the sender.
D . It is encrypted by a Cisco encryption appliance.

View Answer

Answer: A

Explanation:

When CRES (Cisco Registered Envelope Service) is unavailable, Cisco ESA will requeue the message and attempt to resend it later, until the maximum number of retries or the maximum age of the message is reached. The message will not be sent in clear text, dropped, or encrypted by another appliance.

Reference: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 12-8.