Secure Transport Compliance:
TLS (Transport Layer Security) ensures that emails are encrypted during transit between sending and
receiving email servers.
Setting up secure transport compliance ensures that emails sent to or received from a particular
domain use TLS.
Steps to Enforce TLS:
Navigate to the Google Admin console.
Go to Apps > Google Workspace > Gmail > Advanced settings.
In the "Compliance" section, select "Secure transport (TLS) compliance".
Click "Add setting" and configure the following:
Select the appropriate organizational unit.
Specify the receiving domain(s) for which TLS should be enforced.
Choose to enforce TLS for incoming, outgoing, or both types of messages.
Save the changes and apply them.
Reference
Google Workspace Admin Help: Set Up TLS Compliance
