When virtual gateways are configured, which two distinct attributes are allocated to each virtual gateway address? (Choose two.)

A Cisco ESA administrator was notified that a user was not receiving emails from a specific domain. After reviewing the mail logs, the sender had a negative sender-based reputation score.
What should the administrator do to allow inbound email from that specific domain?

What is the maximum message size that can be configured for encryption on the Cisco ESA?

Which two features of Cisco Email Security are added to a Sender Group to protect an organization against email threats? (Choose two.)

When email authentication is configured on Cisco ESA, which two key types should be selected on the signing profile? (Choose two.)