Soft Repository

Thunderbird is a free and open-source email client developed by Mozilla Foundation, the same organization that created the popular Firefox web browser.

Thunderbird is a free and open-source email client developed and maintained by a subsidiary of the Mozilla Foundation. It has a flexible tabbed GUI, standard mail-related features, and the ability to manage multiple accounts within one window. Thunderbird also has customization options, expandable power through various add-ons, and high security due to its open-source nature and ability to store personal data locally.

It's easy to set up and works on Windows, macOS, and Linux. Despite not being the most flexible or flashy option, Thunderbird is a robust and dependable email client suitable for managing multiple accounts with no bloat and low resource usage.