Undo sent mail in Gmail

I have to say this is the feature I’ve always dreamt in past cause I have a bad habit of the clicking the send button as soon as I reach the end of the mail. And only then after I click the send button do I realize that revision is part of sending good mails. And I think all of us know mail with typos and stupid grammar mistakes.

Now with Undo Send feature enabled I can just hit undo link if I know I forgot to revise that important mail.

Thanks Google!!! for noticing my bad habit.

Update:-

By the way you have only 5 seconds to click that undo button. So, think fast!!!

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