How can better email worms be created? How can spyware claim more victims? How can better spam be sent? It turns out that these three questions are all related. We look at the future threat posed by email worms, spyware, and spammers that use zombie machines in a new way: sophisticated data mining of their victims saved email. The end result skirts many defenses, and could trick even experienced users. We present new defenses that can be deployed now against this threat.