A cypherpunk anonymous remailer is a Type I anonymous remailer that takes messages encrypted with PGP or GPG, or in some cases in plain text, and forwards them removing any identifying information from the header.
Step 1: Retrieving the remailer's Public Key.
Step 2: Import remailer's public keys into PGP or GPG.
Step 3: Compose Message
Step 4: Encrypt Message
Step 5: Send Encrypted Message to Remailer