It also includes features like calendar and task integration, along with many other modifiable inbox rules that help you keep you updated. What’s interesting is, MS Outlook supports almost every email service known thus, helping you to manage all your email addresses in one single place. However, for advanced features you can buy the paid version. The best part about Microsoft Outlook is that it already comes bundled with most of the Office 365 plans. Price: Free version available $29.50 for lifetime subscription Outlook What we especially like about this email client is its function of “Undo Send” which is uncommon. It also offers support for different third-party apps namely Facebook, WhatsApp Web, Google Calendar, Dropbox, and more. Mailbird puts the widescreens to best of use by offering a calendar view.