Mutt Alternatives

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response

Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.

Apps/Evolution - GNOME Wiki!

Mailspring is a mail client for Mac, Windows and Linux.

Alpine is a fast, easy to use email client that is suitable for both the inexperienced email user...

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.

Geary is an email application built for GNOME 3.

The Power Email App for busy professionals, like you.

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

NeoMutt is a command-line mail reader. It's a version of https://alternativeto.