Penet remailer

Penet is a type of remailer used for sending anonymous email messages. It was designed to allow users to send and receive emails without revealing their identity or IP address. Penet operates by acting as an intermediary between the sender and the recipient, stripping away identifying information from the email before forwarding it. The service became well-known in the 1990s for providing a way to communicate without disclosing the sender's information, which appealed to users interested in privacy and anonymity.