Mailspring Alternatives

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

Mailbird is the best email client for Windows 7, 8 and 10

The Power Email App for busy professionals, like you.

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

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

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

Airmail is a lightweight and lightning fast mail client for Mac.

Apps/Evolution - GNOME Wiki!

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

There’s big news attached.

K-9 is an opensource email client making it easy to chew through large volumes of email.

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

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