Finally! the "undo send" option has graduated from Gmail Labs and is now official for use on the web version of the search giant's email service.
The undo send feature as some already know, allows you cancel a mail you are sending within a short amount of time which can be set by the you. Users have the option to set a small amount of time between 5-30 seconds with which you can quickly decide just incase you have a change of mind or say, you notice a typo in the text.
The feature which has been in the Gmail Labs for close to six years until now, can be found in the Gmail web version general setting tab.
Gmail Labs is where the experimental things are added, until they are finalized or successful, then they get to become actual options in the Gmail Settings.