Google has released a new email feature to help people avoid emailing under the influence after a few evening cocktails.
Mail Goggles, a free optional extra, switches on after dark an on weekends, when drunk emailing is most prevalent, and requires the user to answer five simple maths problems in under a minute in order to send a message.
"Sometimes I send messages I shouldn't send," Gmail engineer Jon Perlow wrote Monday in a website posting announcing the optional new feature.
"Like the time I told that girl I had a crush on her over text message. Or the time I sent that late night email to my ex-girlfriend that we should get back together."
Gmail users can choose whether to activate the Goggles feature and set the times when it is active.
"It will check that you're really sure you want to send that late night Friday email," Perlow wrote.
"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?"