Gpg-remailer is somewhat similar to ordinary mailing list software, but all e-mail processed by gpg-remailer is PGP/GPG signed and encrypted.

Gpg-remailer decrypts received PGP/GPG messages, verifies the received signature and re-encrypts the e-mail for the members of a well defined group of recipients. Using gpg-remailer the list of members of a group of people who want to exchange encrypted and authenticated e-mail can be maintained at one location, allowing the members of the group to specify just one e-mail address to send PGP/GPG signed and encrypted e-mail to.

Gpg-remailer recognizes the following e-mail formats: * Standard simple encrypted messages. * Multi-part encrypted messages. * Encrypted messages containing detached signatures.