Gmail Can Now Save You From Major Embarrassment Now users can hit 'undo send' on emails By John Johnson, Newser Staff Posted Jun 23, 2015 2:06 PM CDT 17 comments Comments (Shutterstock) (Newser) – Anyone who's sent an email and immediately started shouting "No, no, no" at the computer might appreciate this new Gmail feature: Users can now call back an email within 30 seconds before it travels on its way, reports NBC News. The "undo send" feature is now available, though users will have to enable it under the settings menu. (The menu is under the cog icon in the upper right of the screen.) There, they can choose a window ranging from five to 30 seconds within which they can undo their reply-all gaffe or whatever. The feature has been in the experimental phase for six years, notes Gizmodo, which has some prudent advice: "Turn it on right now."