In order for cloud services to accept email from your domain the domains being used must be added to your authorized domains.
Any DLP version
In the enforce UI go to System > servers and detectors > Overview > click on the cloud email server
Find the TXT record on this page, and send to your DNS administrators to add as a text record on any and all applicable domains.
Click on update email domains
Click on the add button
Add your domains separated by commas.
Click add domain.
Note: if there are any issues adding the domains you can click the revalidate button at any time.
Validation will only occur if the DNS has the appropriate text record.
For additional guides please see the "Getting Started with Data Loss Prevention"
To provide feedback please click on the "Feedback" link or send an email to "[email protected]"