Anonymous remailer is a type of a web server which accepts email messages from sender and pass it to the recipient without disclosing the details of the sender. The sender sends the encrypted messages to the recipient and the remailer decrypts the information within the message. It actually hides the address of the sender. There are 3 kinds of Remailers such as Cypherpunk remailers, Mixmaster remailers and Mixminion remailers.