Which two action types are performed by Cisco ESA message filters?

Non-final actions are actions that do not terminate the message filter evaluation, such as adding headers, setting variables, logging, etc. Final actions are actions that end the message filter evaluation and determine the fate of the message, such as accept, drop, bounce, quarantine, etc.

References: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 3-4.