Inbox by Gmail will let you unsend e-mails
Undo Send, now available for the first time on your phone, lets you take back an e-mail you’ve just sent. As you can see from the promotional video, it could be a life saver.If you spot a mistake or you need to stop an e-mail going to the wrong person, you can simply click undo. This unsends the e-mail and gives you the chance to make your alterations.Inbox by Gmail is now open to everyone, with no invite required. It has a couple of nifty features, including the ability to add reminders to the top of your inbox, see the important details of some messages without needing to open the mail, and even snooze messages and reminders until it suits you.For more information, check out the Inbox by Gmail page.