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The Mozilla Thunderbird 144 open-source email, news, chat, and calendar client has been released today as part of the Mozilla Firefox 144 web browser release, bringing various changes and plenty of bug fixes.
Mozilla Thunderbird 144 is here to update the Flatpak runtime to Freedesktop SDK 24.08, fix an issue where users could not read mail signed with OpenPGP v6 and PQC keys, fix an issue with Fastmail CalDAV app password access failing due to forced OAuth regression, and fix copying text from some error alerts.
This release also fixes an issue with the Delete key failing to prevent deleting attachments in OpenPGP messages, an issue with newly created folders missing from the "Recent" menu when moving a message, the broken 'Copy Message to' action in newsgroup filters, and a crash that occurred in various scenarios.
Also fixed is an issue with the Reply All button missing when using an Exchange account, an issue with news messages marked as read after an NNTP error prevented retrieval from the server, and an issue with changing the identity in the compose window caused by an unsaved modified draft.
Moreover, Thunderbird 144 fixes an issue where sending emails via servers with a self-signed certificate didn't work, an issue where importing a profile located at the top level of a zip file didn't work, and an issue where the sender avatar was displayed incorrectly for 'Name' via the address sender format.
On top of that, Mozilla Thunderbird 144 fixes an issue where sorting by threads only brought threads with unread top messages to the top, an issue with the image preview in the Insert Image dialog failing with CSP error for web resources, and an issue where calendar discovery with a certificate error displayed multiple exceptions.
Among other fixes, Thunderbird 144 addresses an issue where Shift-clicking 'Compose Message To' on a 'mailto' link didn't open in plain text, an issue where Thunderbird could not copy an event in multiweek or month view via drag and drop, and an issue where task reminders failed for tasks without end dates or with shifted due dates.
Also fixed is a hang that occurred when auto-checking multiple accounts for new messages, an issue with multi-attachment delete/detach confirmation only citing the first attachment, as well as an issue where not all headers were signed when creating a digitally signed OpenPGP email.
Last but not least, Thunderbird 144 makes it possible to test a configured personal S/MIME certificate for a sub-identity, as well as to test an S/MIME certificate for an old/invalid certificate. This release also addresses a total of eleven security vulnerabilities and brings various visual and UX improvements.