After three years, Facebook is killing its @facebook.com email service. When it launched in late 2010, Zuckerberg and Co. touted the systems basic approach to messaging (think: no attachment or CC/BCC features). However, in a statement given to The Verge, the outfit confirmed that barely anyone was using the service. If you did use it, though, dont fret: any incoming mail will now be forwarded to your primary email address.