buffy software package provides Heavy duty browser for mail folders, 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 buffy
buffy is installed in your system.
Make ensure the buffy package were installed using the commands given below,
$ sudo dpkg-query -l | grep buffy *
You will get with buffy package name, version, architecture and description in a table
| Distro | Ubuntu 17 |
| Section | Miscellaneous |
| Package | buffy |
| Version | 1.5-2build1 |
| Description | Heavy duty browser for mail folders |
| Sub Section | misc |