This is a come-on to get you to cough up $10 for a list of servers. The last time I was able to drop email on an unguarded SMTP server was 1996 -- since then, the ISPs have wised up and closed their loopholes. Also, the "simple" version does a buffer overflow trixie on the first HELO -- send a message to yourself using your current ISP's smtp server (it will work). Then look at the headers. You wouldn't like to get mail like this (snort complains when it goes out, in fact); so why send it? The only "completely anonymous email" requires work: The cypherpunk mixmasters. Even the best of those come with NO guarantees that anonymity will be preserved. Very old hack.