When sending emails from web interface, usually we need to wait for the email is sent. It sometimes takes up more time when we are attaching huge files. If you send a lot of email, that can add up to a lot of lost time. Gmail has introduced a new feature called Background Send which helps you reduce the delay you face after hitting the send button. Once you turn it on from theLabs tab in Settingyou can get on with what youre doing while Gmail quietly sends off your mail in the background.