Have you ever had an episode of drunk emailing that backfired on you? Once sent, an email message cannot be "unsent" when you sober up. A new Gmail feature from Google may prevent that from happening again.
When you enable Mail Goggles, it will check that you're really sure you want to send that late night Friday email. And what better way to check than by making you solve a few simple math problems after you click send to verify you're in the right state of mind?
By default, Mail Goggles is only active late night on the weekend as that is the time you're most likely to need it. Once enabled, you can adjust when it's active in the General settings.
Link -via J-Walk Blog