This is how you would configure messaging within Integrations in CRD. This feature allows you to select which account you would like your schedules to send messages from.
Integrations - Messaging
Select Integrations.
Select Messaging.
Email Type: Click the dropdown arrow to select which email type you prefer.
Account: Click the dropdown arrow to select which account you would like to send messages from.
Click the Test button to test the account.
The Email Test window will pop up. Enter your email to send the test email to and click OK.