Google 's new Gmail feature , ` ` Undo Send , '' lets users rescind messages . Gmail is the third most popular e-mail site , following Yahoo ! ` ` Mail Goggles '' can prevent users from sending drunk e - mails they may later regret . The best Gmail security features are permanent if enough users like them . Gmail is the third most popular e - mail service , with tens of millions of users .
Google 's new Gmail feature , ` ` Undo Send , '' lets users rescind messages . ` ` Mail Goggles '' can prevent users from sending drunk e - mails they may later regret . The best Gmail security features are permanent if enough users like them . Gmail is the third most popular e - mail service , with tens of millions of users .