Thunderbird is a free and open source email, newsfeed, chat, and calendaring client

A better version of Thunderbird

Zarządzanie wiadomościami, kontaktami i terminarzem

Wysyłanie i odbieranie poczty

The best email app for people and teams at work

Secure email, calendar & contacts

System tray new mail notification for Thunderbird

Lightweight open-source email client for Linux