I want to send somebody at work an anonymous e-mail that he won't be able to trace back to me. Nothing harmful, threatening, or illegal, just info that he needs that he doesn't need to know came from me. What kind of e-mail account can I use to do this? He may send it to the IT department to trace, so I need it pretty reliable. I also need it where I don't have to install any of their programs on my computer and spam-free. Does such a beast exist?