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Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
POP Peeper - POP Peeper is an email notifier that runs in your Windows task bar and alerts you when you have new...
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.