HOW TO UNDO YOUR SEND MAIL.

Did you clicked the send button BY MISTAKE[ in the middle of something ]? 


dont worry gmail provides a facility to undo your send mail



the Gmail has the feature, you have to enable it under Lab.


Go to settings


,click labs,



find the [Undo Send] option, just enable it.]



and
When you send the message in the top of the page you can see



Just click undo, and your mail wont be send