Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Apple Mail - There’s big news attached.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.