Polymail - Native email app for email productivity.
Canary Mail - Privacy-aware email app for Mac & iOS
HEY - Email at its best, new from Basecamp.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
KanbanMail - A Kanban board for your emails.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.