Safeweb Hotmail Question

Safeweb principally offers web browsing anonymity. Our source for the RIAA meeting allegations used a hotmail address which resolved to a Safeweb IP address. However, I don't see on Safeweb's site an anonymizing mail service. Is there such a service by Safeweb or does it sell an anonymizing e-mail program? The source last wrote that "multiple" Safeweb protection was used to cloak the messages. Is there a way to chain Hotmail to Safeweb, or some other way to "multiple" Safeway protection as preamble to Hotmail? It would be intriguing to learn that the source is connected to Safeweb itself, or Safeweb's backers.