More than any other Google offering, Gmail has been bolstered for years with a range of weird options tucked away in a "Labs" tab in the settings screen. On Tuesday, one of the webmail provider's most interesting Labs options, "undo send," graduated to official status.

With the option, Gmailers get the chance to click an "undo send" link at the top of the screen after clicking "send" on any e-mail message. As with the original Labs version, the option, which now lives in the service's "general" settings tab, lets users pick a safety timespan between 5-30 seconds. Messages won't actually send until that time runs out, unless a user clicks the "view message" tab next to "undo," at which point a message will immediately whisk through the Internet's many tubes and reach its recipient.

The six-year-old option, which won't be turned on for the general public by default, had previously lived in Gmail's Labs tab, so if users wanted to enable it, they had to bypass a stark warning about "experimental" features that could "change, break, or disappear at any time." Major competitors like Hotmail and Yahoo Mail have yet to offer a similar option.

"Undo send" wasn't actually Labs' most stark "whoops, didn't mean to send that" option; that honor belongs to 2008's Mail Goggles, which made users solve math problems before they could click send on late-night e-mails. Sadly, that drunk-send-prevention option was discontinued in 2012 with little fanfare.