Online eating disorder support resources

I know that I have an eating disorder... I starve myself for weeks eating as little as possible, then stuff myself to the point where I am sick. I want to know where I can go, through e-mail or over the internet, to talk to someone anonymously. I am too embarrassed to tell anyone around me. I realize how bad this is because of how it is affecting my life and happiness. I am trying to reach out... So who can I e-mail?