gpg-remailer software package provides Forwards re-encrypted PGP/GPG mail to a group, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gpg-remailer
gpg-remailer is installed in your system.
Make ensure the gpg-remailer package were installed using the commands given below,
$ sudo dpkg-query -l | grep gpg-remailer *
You will get with gpg-remailer package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Development |
| Package | gpg-remailer |
| Version | 3.02.00-1 |
| Description | Forwards re-encrypted PGP/GPG mail to a group |
| Sub Section | devel |