How to generate a warning message for external recipients

Problem

How can you generate a warning message to be displayed when sending emails to external recipients.

Environment

  • Gmail Web user interface

Solution

  1. Go to your Google Admin console.
  2. Go to Menu  > Apps > Google Workspace > Gmail > End User Access.
  3. Scroll to and click Warn for external recipients.
  4. Check or uncheck the box to turn warnings on or off.
  5. Click Save. 

Note: Changes may take up to 24 hours to be visible, but usually they are reflected more quickly.