Remember that time you hit the "Send" button, and suddenly changed your mind, frantically clicking and closing stuff on your desktop in a futile attempt to stop your fiery diatribe? Funny how clicking one final button focuses the mind, after it's too late. Now those clever Gmail programmers have a little routine that fixes that, giving us "Undo Send," a Google Labs setting that lets you call back your emails. We've loaded it and tried it out for you.
After a quick enabling of the feature on the Gmail Labs Settings page, there it appears just after you send a message: Undo. And hey, it works perfectly. There's a catch, though — you can only recall an email for about five seconds. But this is a whole lot better than nothing. Thanks, Google! Now go figure out how to recall email messages 24 hours later and erase all memory of them.