Mutt is described as 'small but very powerful text-based mail client for Unix operating systems' and is a popular Email Client in the Office & Productivity category. There are more than 50 alternatives to Mutt for a variety of platforms, including Windows, Linux, Mac, BSD and iPhone. The best alternative is Thunderbird, which is both free and Open Source. Other great apps like Mutt are Microsoft Office Outlook (Paid), Mailbird (Paid), Evolution (Free, Open Source) and eM Client (Freemium).
Mailbird helps individuals and businesses manage emails in one place. This allows you to simplify your workflows. Therefore, spend more time on important tasks. Moreover, 9 in 10 of our customers describe our interface as “intuitive” and beautiful.
Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability
Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even the most demanding workloads.