An administrator notices that the Cisco ESA delivery queue is consistently full. After further investigation, it is determined that the IP addresses currently in use by the Cisco ESA are being rate-limited by some destinations. The administrator creates a new interface with an additional IP address using virtual gateway technology, but the issue is not solved. Which configuration change resolves the issue?
A. Use the CLI command alt-src-host to set the new interface as a possible delivery candidate
B. Use the CLI command loadbalance auto to enable mail delivery over all interfaces
C. Use the CLI command deliveryconfig to set the new interface as the primary interface for mail delivery
D. Use the CLI command altsrchost to set the new interface as the source IP address for all mail