How do I enable Gmail's "Undo Send" setting?

Cirrus Insight for Gmail

There are instances where Cirrus Insight may not be able to find Gmail's unique identifier for messages that you've sent. To avoid issues with an inconsistent status message, we recommend that you enable Gmail's popular "Undo Send" feature. 

Here's how:

1. Click the Gear icon at the top right of your Gmail browser window. 

How do I enable Gmail's "Undo Send" setting?

2. Click on Settings in the drop-down menu to access Gmail's settings (not Cirrus Insight's).

How do I enable Gmail's "Undo Send" setting?

3. The General tab is displayed. Scroll down and locate the "Undo Send" section. Click to check the box next to "Enable Undo Send."

How do I enable Gmail's "Undo Send" setting?

4. Scroll to the bottom and click on the "Save Changes" button.