Experian 's Hitwise.com 's new Gmail feature , `` Mail Goggles '' , '' lets users rescind messages . `` Mail Goggles '' can prevent users from sending drunk e-mails they may later regret . `` Sometimes ... I send a message and then immediately notice a mistake , '' said Michael Leggett , a Gmail Labs designer and the creator of the `` Undo Send '' feature , in the Gmail blog . The best Gmail features become permanent if enough users like them . Gmail Labs is the fifth most popular e-mail service , with tens of millions of users .
Experian 's Hitwise.com 's new Gmail feature , `` Mail Goggles '' , '' lets users rescind messages . `` Mail Goggles '' can prevent users from sending drunk e-mails they may later regret . The best Gmail features become permanent if enough users like them . Gmail Labs is the fifth most popular e-mail service , with tens of millions of users .