My kid got that email and somehow found herself signed up on blubet. (Ok, she signed up, thinking her legitimate friend was trying to legitimately send her something.) I helped her cancel her blubet account. I assume it only emails everyone in your contacts list if you use MS Outlook? She was using gmail on linux (Asus Eee PC) so at least didn't have that problem! (Which answers your question -- a way to avoid this problem is use a different email program and/or OS ;)