Mu4e - Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.
DistroWatch - 9 hours ago - It does include a proprietary software set optimized for business users, students, researchers and developers." A list of features and further details can be found in the company's release announcement.
Mutt - Mutt is a small but very powerful text-based mail client for Unix operating systems.
Ubuntu - Ubuntu is a Debian Linux-based open source operating system for desktop computers.
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
SUSE Studio - Modernisieren Sie Ihre Infrastruktur mit SUSE Linux Enterprise Server, OpenStack Cloud-Technologie für IAAS und softwaredefiniertem Storage von SUSE.