Yahoo’s researchers want you to volunteer a one-cent fee for your outgoing emails, with proceeds from the virtual stamp going to charity, in a bid to cut down on spam. Can doing good really do away with spam, which consumes 33 terawatts of electricity every year, not to mention way too much of our time? The idea behind CentMail is that paying to send email – even a single penny – differentiates a real e-mail from spam blasts, and thus, spam filters can be adjusted to let the stamped mail sail right through, according to a report from New Scientist

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