In recent time there has been great innovation from Google on email service. Be it Inbox, or option to recall the email within few seconds from the time you sent it or predictive analysis. 
Inbox started well but overall nothing much new apart from reorganizing the Gmail! But when it comes to other features it’s great innovative thinking and solving the problem. Many times when we send email and realize OOPS! and there comes Gmail’s recall feature comes to help. Another excellent feature avoids another OOPS movement, after sending email realizing missed to attach the attachment. Gmail checks the text and proactively alerts you didn’t attach the attachment but your text shows you wanted to attached. Good catch. Keep up Gmail team!
Leap Forward 