1.

Inboxer

Email by hb882
Unofficial, free and open-source Inbox by Gmail Desktop App. NOTE: This is only to provide appimages, I am not the developer.
AppImage
Rating: 5.0
Mar 21 2019
2.

Tutanota

Email by hb882
Tutanota is an email client with a strong focus on security and privacy that lets you encrypt emails on all your devices. NOTE: This is only to provide appimages, I am not the developer.
AppImage
Rating: 5.0
Mar 21 2019
3.

Protonmail

Email by hb882
ProtonMail Desktop is an unofficial app that emulates a native client for the ProtonMail e-mail service. NOTE: This is only to provide appimages, I am not the developer.
AppImage
1 comment
Rating: 5.8
Nov 25 2018
4.

Thunderbird - Appimage 45.4.0

Email by AJSlye
Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features! NOTE: This is only to provide appimages, I am not the developer.
AppImage
Rating: 5.8
Jun 26 2018