Can I cancel an email right after sending it?
Cancel an email within seconds of sending it thanks to the undo-send delay.
Yes: after clicking "Send", you have three seconds to cancel the send. A message appears showing "Sending…" along with a "Cancel" button during this short window.
The cancellation window
As soon as you send, a three-second countdown begins. During this time, you can click "Cancel". After that, the email is sent for good and can no longer be recalled.
What happens if I cancel
The email isn't sent and you're returned to your editor. You can then edit it, fix it, or send it later.