I mistakenly sent an email in Gmail, and now I'm wondering if there's any way for me to unsend it. I came across the "Undo Send" option and heard it mentioned, but I don't really know how it can be done or if the feature works after the email is sent. Can you only undo an email in Gmail straight away, or is it also possible after a few minutes? Please, provide me with the instructions for the desktop and mobile versions if possible. Thanks in advance!