Cisco 300-720 Question Answer
When a network engineer is troubleshooting a mail flow issue, they discover that some emails are rejected with an SMTP code of 451 and the error message " #4.7.1 Unable to perform DMARC verification " . In the DMARC verification profile on the Cisco Secure Email Gateway appliance, which action must be set for messages that result in temporary failure to prevent these emails from being rejected?

