Available in multiple formats, including Snap , Flatpak , .deb (for Ubuntu/Debian), and .rpm (for Fedora/Red Hat). Key Features for Modern Email

Includes spellcheck and translation features for multiple languages. Pricing: Free vs. Pro

Full support for swipe gestures to quickly archive or snooze messages.

Try Mailspring If You're Tired of Terrible Desktop Email Apps

Mailspring is a high-performance, open-source email client designed to bring modern productivity features to Windows, macOS, and Linux desktops. Built as a faster, leaner successor to Nylas Mail, it utilizes a native C++ sync engine that consumes up to 50% less RAM than its predecessor.

Mailspring is for basic email management, supporting up to four email accounts in the free version.

Manage all your email accounts in a single view, eliminating the need to switch between tabs.

Choose from several built-in themes (including dark mode) or create your own using CSS.