Log in to your Gmail account. Click on the drop-down option just below the Google logo image.   Select contacts option. Now on the left side, you can see more option with some sub-options. click on the Export option. You can see some options in a pop up window. Select …

First, Click on the right side gear icon and click on setting option. Now, In the general tab, you can see an option “UNDO SEND”. Enable Undo Send. You can set the send cancellation time. The maximum time frame is 30 second. Thanks!