Mail Goggles on Gmail can be set to spring into action late at night and at weekends asks emailers to answer a series of short mathematical posers before sending their message off. The idea is to help people who are a little too "tired and emotional" to foresee the consequences of their actions.
Gmail blog comment "Sometimes I send messages I shouldn't send," he confessed. "Like the time I told that girl I had a crush on her on a text message. Or the time I sent that late-night email to my ex-girlfriend that we should get back together." The program is designed to establish whether "you're really sure you want to send that late-night Friday email".
Even alleged communications experts occasionally need a moment to check what they have written - and to whom. Three years ago, Alastair Campbell was forced into what passed for an apology after accidentally emailing abuse about the BBC's Newsnight - "Fuck off and cover something important you twats!" - to a reporter on the programme rather than his Labour party advertising advisers.