Were you wondering how Yahoo managed to recover deleted email that was supposedly impossible to retrieve? You're not the only one. A judge has partially granted a motion that orders Yahoo to explain how it recovered deleted email from UK drug trafficking convict Russell Knaggs. It won't have to detail more than how it dealt with the email account in question, but that still means having to say just how it grabbed six months of message drafts when its own policies suggest this should have been impossible. The company has to provide both documents and a relevant witness by August 31st.