Wavebox

[labbe5]

https://www.linuxhint.com/wavebox-email ... ffice-365/

Wavebox Email Client (formarly known as Wmail), is an open-source mail client that allows you to access the different online services such as email, colloboration tools, etc all in one dashboard. This includes Gmail, Google Inbox, Outlook, Office 365, Slack, Trello & more. Wavebox let’s you bring all your web communication tools together for faster, smarter working.

32-bit :
wget https://github.com/wavebox/waveboxapp/r ... x_ia32.deb
64-bit :
wget https://github.com/wavebox/waveboxapp/r ... x86_64.deb

Above are deb files provided by reviewer.

Wavebox website with download section for Ubuntu 12.04 +, Debian 8, even Snap packages are provided :
https://wavebox.io/download