A new feature of Google’s GMail service will provide a layer of protection against the common mistake of emailing while intoxicated.

According to a post on The Official Gmail Blog titled ‘New in Labs’: “Stop Sending Mail You Later Regret,” Gmail now sports a feature known as “Mail Goggles.”

When enabled, Mail Goggles asks a set of basic math questions after clicking the send button; just “to verify you are in the right state of mind” to send emails, said Jon Perlow, Gmail engineer and author of the post.

By default, Mail Goggles only functions late night on the weekends; however you are free to choose your own times to fit your needs.

What makes Mail Goggles effective isn’t the use of “challenging” math questions, but rather a simple timer. When the Mail Goggles dialogue box appears, you have sixty seconds to answer a few math questions which only require an elementary school education to answer.