The new Thunderbird version 145 is now available for Windows, macOS, and Linux with a package of new features focused on compatibility, stability, and security (following Thunderbird 144Among the highlights, the client adds Integrated support for Microsoft Exchange via EWS and enables DNS query encryption over HTTPS (DoH).
In addition to the features, the project has refined many details and resolved issues identified by the community. One significant change also stands out: Binaries for 32-bit x86 Linux are no longer being distributed, while also implementing multiple fixes and user experience improvements.
Key new features of Thunderbird 145
With this release, Thunderbird incorporates features designed for both home and business environments. The most notable is that Exchange now works natively via Exchange Web Services (EWS), initially focused on email; calendar and address book integration is planned for later. Also included is DoH, which encrypts DNS queries and helps to safeguard name resolution against interference, continuing the security improvements of the project.
- Microsoft Exchange support via EWS (email for now); the protocol implementation is written in Rust and does not require third-party plugins.
- Enabling DNS over HTTPS to strengthen privacy.
- Option manual configuration in the Account Hub for email accounts.
- Possibility of manual configuration during the creation of EWS accounts.
Behavioral changes and cleaning
Along with the new features, the team has refined terminology and removed obsolete elements. Starting with this version, “Junk” is now consistently referred to as “Spam” throughout the interfaceSkype is removed from the address book's messaging selection, and older preferences are being phased out to simplify setup, similar to previous releases such as Thunderbird 143.
- Special folders with consistent names according to their type.
- Skype removed from the IM selector in the address book.
- Removed default_supports_diskspace.{HOST} and default_offline_support_level.{HOST} preferences.
- End of shipping binaries for 32-bit x86 Linux.
Usability improvements and minor optimizations
Several everyday friction points have been addressed to make the experience smoother. Among other things, Improves the handling of emoji sequences in mattersRemote content is now correctly displayed in EML messages, and drag and drop of ICS files to the Today panel is working again.
- The emoji sequences in the subject line are interpreted correctly.
- “Display remote content” now also works with EML messages.
- Restored drag and drop of ICS files to the Today panel.
Featured arrangements in Thunderbird 145
The MZLA Technologies team has resolved a number of bugs that were affecting stability, accessibility, and day-to-day tasks. According to the changelog, 25 bugs have been fixed and 11 security patches have been releasedin addition to visual and UX improvements:
- “Save all” no longer overwrites attachments with the same name without warning.
- Message headers are not re-downloaded at each startup.
- The Spam button on the unified toolbar correctly changes to "Not spam".
- After updating, the menu bar is no longer hidden.
- When configuring external GnuPG, you will be prompted to import the public key when appropriate.
- The compose window no longer disappears from the taskbar in Windows.
- The issue that the "Sent" and "Spam" folders were not always created in new IMAP accounts has been resolved.
- Fixed the bug that affected @att.net authentication when switching from 128.xa to 140.x with Yahoo backend.
- Task reminders are working again without an end date or with moved due dates.
Account Hub and Exchange: more robust
The account signup area has been thoroughly overhauled. Numerous accessibility and account creation issues have been fixed, as well as the integration with Exchange via EWS. gains in reliability when authentication fails or requires manual steps.
- Add-on account creation is working again in Account Hub.
- Owl's installation displays its link in Account Hub.
- The user field appears when Exchange authentication fails.
- Disabled fields in the address book can no longer be toggled by mistake.
- The manual configuration left the connection security set to "None" by default: fixed.
- The Close button and error notifications are now narrated correctly.
- It is possible to disable the loading overlay (spinning overlay) in email.
- Information about deleted accounts is removed from the “Export to mobile device” menu.
- Keyboard shortcuts are not executed on the Hub's background screen.
- Some third-party hosted accounts that could not be created are now supported.
- Spam checking works with the mail.server.default.check_all_folders_for_new option enabled.
Security
This cycle includes fixes for vulnerabilities, some classified as high severityIt is recommended to update as soon as possible, either from the client itself or by installing the package available on the official website.
Thunderbird 145 Availability and Requirements
Thunderbird 145 is distributed for Windows, macOS (from 10.15 Catalina) and 64-bit Linux. The update It can be applied from the program menu or downloaded as a full installer from the official website. On Linux, there are no longer any 32-bit builds.
Thunderbird remains a multi-tool client with email, calendar, RSS feeds, Usenet and chat (IRC, XMPP and others), with the Gecko rendering engine and broad extensibility through add-onsThe project's philosophy remains the same: many customization options and an evolution guided by community feedback.
With all of the above, version 145 consolidates Thunderbird as a solid and versatile option: more compatible with Exchange, more private thanks to DoH, without legacy burdens like 32-bit binaries, and with a generous block of fixes that makes a noticeable difference in everyday use.
