Sometimes you regret sending a message. Other times you send a message and then immediately notice a mistake. You forget to attach a file or email the birthday girl that I can't make her surprise party. I can rush to close my browser or unplug the Internet — but Gmail almost always wins that race.

An email to the wrong Larry pushed you over the edge. You could undo just about any other action in Gmail — why couldn’t you undo send? Many people agreed, including Yuzo Fujishima, an engineer in the Tokyo office.
And now you can do just that. Turn on Undo Send in Gmail Labs under Settings, and you’ll see a new “Undo” link on every sent mail confirmation. Click “Undo,” and we’ll grab the message before it’s sent and take you right back to compose.
This feature can't pull back an email that's already gone; it just holds your message for five seconds so you have a chance to hit the panic button. And don't worry – if you close Gmail or your browser crashes in those few seconds, we'll still send your message.
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