Thunderbird has recently released version 153, also known as “Meadow,” introducing significant updates that enhance functionality for users and admins alike. This new Extended Support Release (ESR) of the well-known open-source email client features a redesigned account setup dialog, native support for Microsoft Exchange through Exchange Web Services (EWS), and improved system notification features.
Streamlined Account Setup
One of the standout new features in Thunderbird 153 is the revamped “Account Hub”. This hub simplifies the initial setup process, using Autodiscover methods and automatic protocol detection to gather the necessary server credentials. This means users can often skip manual entry of IMAP, SMTP, or CalDAV parameters, provided their email provider supports these features.
Additionally, users can now set up both local and server-based address books through the same interface. Thunderbird will automatically search existing email accounts for available, yet unconfigured, address books, making account management a breeze.
For OAuth logins, Thunderbird will open the default browser for authentication. This separates the password prompt from the email client, enhancing security. Users authenticate via their browser, allowing Thunderbird to receive an access token in place of their actual password, thereby maintaining the user’s existing multi-factor authentication and session management.
Native Microsoft Exchange Support
One of the most anticipated features is native support for Microsoft Exchange via EWS. This integration allows users to set up Exchange accounts without the need for additional plugins, facilitating easier email retrieval, composing, and management. This native support marks a shift that many users have long awaited, bridging a gap that existed before.
Furthermore, support for Microsoft Graph is already built-in but currently disabled by default. This newer API platform from Microsoft is anticipated to allow for integration of calendars and address books from Exchange accounts in future releases, with complete support targeted for this year.
Enhanced Notification Actions
Thunderbird 153 introduces direct actions within system notifications. Users can mark incoming messages as read, delete them, or mark them as spam directly from notifications without having to open the Thunderbird window. The exact actions available may vary depending on the operating system in use, but this feature will undoubtedly increase efficiency for busy users.
In addition to these improvements, users can expect better folder sorting and numerous bug fixes and performance optimizations. Existing Thunderbird account users can take advantage of a one-click login feature through the new account assistant.
Gradual Rollout of Version 153
Thunderbird 153.0 is available for Windows, Linux, and macOS as an Extended Support Release. However, automatic updates are being rolled out gradually to catch any potential issues. Users can initiate a manual upgrade via “Help/About Thunderbird”.
For those using Snap or Flatpak packages on Linux, a slight delay in the availability of the new version has been announced. Distribution through the Microsoft Store is also set to come later. Users wishing to access new features more frequently can opt for the monthly Thunderbird release channel instead of waiting for annual ESR updates.
With these updates, Thunderbird continues its commitment to providing a robust and user-friendly email client that meets the evolving needs of both individuals and organizations.
(fo)

