Anonymous remailer

A privacy-focused remailer is a server that receives messages with embedded instructions on where to send them next, and that forwards them while attempting to obscure their origin. There are cypherpunk remailers, mixmaster remailers, and nym servers, among others, which differ in their design and the level of privacy they were intended to provide. It is critical to understand that without integration with an anonymity network like Tor, these systems do not provide anonymity against powerful adversaries.