Thunderbird 156 strengthens the open-source email client with expanded OAuth support, high-impact security fixes, and reliability improvements across IMAP, POP3, Exchange, OpenPGP, attachments, and calendars.

With Thunderbird 154, Linux users gain optional system tray support alongside Microsoft Graph integration, improved search and attachments, and numerous IMAP, Exchange, calendar, security, and stability fixes.

In this article, we will learn how Thunderbird 150 improves secure email handling, usability, and workflow efficiency, making it an even more powerful client for Linux users.