Free Geary Alternatives for Windows
Geary is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The most popular Windows alternative is 
Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked 47 alternatives to Geary and many of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Geary are 
Microsoft Office Outlook (Paid), 
eM Client (Freemium), 
Mailspring (Freemium) and 
Mailbird (Paid).
- Free email application that’s easy to set up and customize - and it’s loaded with great features!.
- eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.
- Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.
- Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface
- Windows 10 has Mail and Calendar apps already built in.
- Mutt is a small but very powerful text-based mail client for Unix operating systems.
- BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
BlueMail is my favorite email client on Android. Tons of features, and no ads. - Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
- The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.
- A whole new way of using email. Reimagined for the modern age, it transforms the way you communicate, share media, interact with notifications, manage your inbox, stay productive or track updates from your favorite publishers and brands.