Though the feature has been available to those in the know as a public beta option for a while now in Gmail Labs, Gmail has now made their Undo Send feature fully legitimized and available to all, meaning that for the first time since we began sending emails, we will be able to take them back. The only catch is, you have a limited window in which to do that take-back.

The original, beta-tested feature delayed sending emails for 5 seconds, allowing you to say, "Oh shit!" and undo your hasty send if you misspelled someone's name, or immediately noticed that you said Thursday when you meant Wednesday. Now, as Google announced in this blog post Monday, all Gmail users can enable the feature and select whether they want emails delayed 5, 10, 20, or 30 seconds. Those who are poor spellers and big email-regretters will probably want to use the 30-second delay.

The New York Times picked up the story and notes that this could also be your saving grace from that awful nightmare of all corporate nightmares, the mistaken all-company reply all.

As Mashable notes, the feature is not yet available on phones, however. Also, they explain, "Google Labs is a collection of Gmail features that allows users to opt in to public betas for services that aren't quite yet ready for prime time. Undo Send was one of the most popular of the Labs features."

Needless to say, Undo Send is trending. And it's inspired some to crack wise.