What are some alternatives?
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
eM Client - eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Postbox - The Power Email App for busy professionals, like you.
Evolution - Apps/Evolution - GNOME Wiki!
Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.