We have authenticated two different email domains for Dynamics 365 marketing. When a user has the same email ID domain as one of the authenticated domains, he/she is able to send marketing emails. But if the email ID domain is not the same as the authenticated domain then the system is showing an error message.
For example CRM user email ID - john.smith@abc.com and Authenticated domain - abc.com (no issues)
CRM user email ID - john.smith@abc.com and Authenticated domain - xyz.com (error message)
Error message - ( From: The from address for this message uses a domain that is not authenticated for your organization)
So, is it necessary to create a CRM user with john.smith@xyz.com to be able to use the xyz.com domain?