gnumail.app software package provides Mail client for GNUstep, 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 gnumail.app
gnumail.app is installed in your system.
Make ensure the gnumail.app package were installed using the commands given below,
$ sudo dpkg-query -l | grep gnumail.app *
You will get with gnumail.app package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | |
| Package | gnumail.app |
| Version | 1.2.2-1build1 |
| Description | Mail client for GNUstep |
| Sub Section |