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A lightning-fast mail client for OS X

Faster way to send and manage your digital mails

An extensible email, newsfeed, chat, and calendaring client

Robust Email Management Tool with Strong Security Measures

The Best Email Client for Windows

Enhanced ProtonMail desktop client

Easily access all your emails from one app

A fine-tuned version of Mozilla Thunderbird

A soft fork of Mozilla Thunderbird

A fully-featured email client app

The Best Secure Email Client Software

Receive email notifications on your Mac's taskbar