Thunderbird is a desktop mail client. It's a companion product to Mozilla Firefox. Besides standard email, it supports newsgroups, feed reading, and chat protocols (XMPP, IRC and Twitter), all with multiple identities or accounts. Through Mozilla Lighning or other plugins it's extensible into a full personal information manager. Out of the box it supports SMTP, POP3, IMAP, SSL/TLS, S/MIME, LDAP, RSS/Atom, and searching, filtering or grouping, labels, virtual folders, and comes with a spam filter.
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115.10.017 Apr 2024 10:25
minor feature:
Creating a tag in General Settings with a number as the tag name did not work
Quick Filter button selections did not persist after restart.
Collapsing and expanding message list headers sometimes caused header to scroll out of view.
Single message with no children inside a parent thread sometimes displayed incorrectly as a thread with a duplicate of itself as its child.
Get selected messages" menu items did not work.
Download and Sync Messages" dialog was too short when using Russian locale, obscuring OK button.
After changing password on an IMAP account, the account could become locked due to too many failed login attempts.
Retrieving multiline POP3 message from server failed if message chunk ended in newline instead of carriage return and newline.
IMAP, POP3, and SMTP Exchange autoconfiguration did not support encryption configuration.
Non-empty address book search bar interfered with displaying/editing contacts.
Deleting attendees from "Invite Attendees" view removed attendees from view, but not from invite.
Splitter arrow between task list and task description did not behave as expected.
Performance improvements and code cleanup.
Security.
115.9.023 Mar 2024 01:05
minor feature:
Opened ignored messages in a message thread/subthread were not marked as read in IMAP folders
Multi-language spellcheck sometimes skipped languages.
Thread tree did not update when live language switching.
Visual improvements to "Reorder Attachments" popup.
Sort order was sometimes incorrect in Grouped By views.
Selecting "Match all messages" in Filter Rules dialog did not disable all search criteria.
S/MIME-only signed messages sometimes incorrectly displayed signature as invalid.
OpenPGP keys uploaded to an HKP keyserver were sent with the wrong. Content-Type header.
Keyboard navigation within search toolbar did not work.
Flatpak builds only had the en-US spell check dictionary available.
Security.
115.8.108 Mar 2024 00:47
minor feature:
Settings: Updating tags failed if Automatic Updates were disabled
Size of collapsed folders in folder pane did not include size of subfolders.
Reversing sort order of Grouped By views in quick search did not reverse.
Removing threaded messages in a unified folder sometimes resulted in an incorrect number of levels in the thread.
Thread collapsing did not behave correctly when copying thread messages in multi-folder view.
S/MIME encryption failed to encrypt if unsupported certificate type was encountered.
Decrypting a copy of an S/MIME encrypted, opaque-signed message created an unreadable message.
Thunderbird sometimes changed the subject of messages selected while simultaneously decrypting a large PGP-encrypted message.
Quote message" menu item in compose window did not work when replying to message opened in separate tab.
Toolbar customization window contents overflowed the window width.
Security.
115.8.021 Feb 2024 08:45
minor feature:
What s New
New.
Added option to show packet dump when OpenPGP fails to decrypt.
Thunderbird slowed down significantly when opening email files (.eml).
Inbox view intermittently reverted to default view after moving or deleting messages.
Size of collapsed folders in folder pane did not include size of subfolders.
Hovering over folder does not always expand subfolders.
Switching to thread pane of a folder using keyboard navigation did not focus top message.
Clicking "Sent unsent messages" in Outbox context menu while in offline mode did not prompt user to go online.
Mail tab-specific Unified Toolbar buttons received focus incorrectly.
Quick Filter settings did not persist when Quick Filter bar was turned off.
Quick Filters were unusually slow.
OpenPGP Key Manager filtering did not work.
OpenPGP sometimes attempted to decrypt message with incorrect key.
Autoconfig failed on servers that did not support OAuth2.
Opening different attachments with the same name in different messages could cause attachment files to become conflated.
Overflowed attachment list could not be scrolled.
Passwords disappeared from password manager list after applying and clearing filters.
Cookies in cookie manager list disappeared after applying and then clearing filters.
Security.
115.7.025 Jan 2024 15:25
minor feature:
What s New
New Autocrypt Gossip key distribution added
Fixes
When starting Thunderbird, unread message count did not appear on collapsed accounts
Blank window was sometimes displayed when starting Thunderbird
Thunderbird "--chrome" flag incorrectly opened extra messenger.xhtml
Add-ons did not start correctly when opening Thunderbird from other programs
Drag-and-drop installation of add-ons did not work if Add-ons Manager was opened from Unified Toolbar
Double-clicking empty space in message pane incorrectly opened the currently selected message
Canceling SMTP send before progress reached 100 did not stop message from sending
PDF attachments open in a separate tab did not always restore correctly after restarting Thunderbird
Some OpenPGP dialogs were too small for their contents
Account Manager did not work with hostnames entered as punycode
Downloading complete message from POP3 headers caused message tab/window to close when "Close message window/tab on move or delete" was enabled
Some ECC GPG keys could not be exported
Contacts deleted from mailing list view still visible in Details view
After selecting contacts in Address Book and starting a new search, the search results list did not update
Various UX and visual improvements
Security fixes
https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird115.7
115.013 Jul 2023 00:48
major feature:
https://www.thunderbird.net/en-US/thunderbird/115.0/releasenotes/
45.2.006 Jul 2016 03:15
minor feature:
Invitations to events could not be printed. Dragging and dropping of contacts from the contact list onto an addressbook while All Addressbooks is selected moved only one contact, Falsely reported not enough disk space during compacting, Links were not always detected properly in the message body (terminated early on " ", some long links not detected at all)
45.1.131 May 2016 06:45
minor feature:
When entering members into a mailing list, the enter key dismissed the panel instead of just moving onto the next line, Email without HTML elements was sent as HTML, despite "Delivery Format: Auto-detect" option, Options applied to a template were lost when the template was used. Contacts could not be deleted when they were found through a search, Views from global searches did not respect "mail.threadpane.use_correspondents"
45.1.012 May 2016 03:15
minor feature:
Drag amp; Drop a contact name from Thunderbird address book (list view) to address box in a new message compose window failed. UI elements became larger when moused over on retina displays/monitor on Mac OS X, DIGEST-MD5 authentication in JS-XMPP failed for some users (now disabled). Font indicator in compose falsely claimed certain fonts were not installed. Printing failed in composition window. Various improvements in handling of message compose in paragraph mode. Automatic correspondents column upgrade disabled
45.017 Apr 2016 18:19
major feature:
When sending e-mail which was composed using Chinese, Japanese or Korean characters, unwanted extra spaces were inserted within the text. Spell checker checked spelling in invisible HTML parts of the message. When saving a draft that is edited as new message, original draft was overwritten. External images not displayed in reply/forward, Crashed in some cases while parsing IMAP messages. Properly preserve pre-formatted blocks in message replies. Copy/paste from a plain text editor lost white-space (multiple spaces/blanks, tabs, newlines), "Open Draft"/"Forward"/"Edit As New"/"Reply" created message composition with incorrect character encoding. : Grouped By view sort direction change was broken, plus enabled custom column grouping. : New emails into a mailbox did not adhere to sort order by received. : Box.com attachments failed to upload. : Drag and drop of multiple attachments failed to OS file folder. XMPP had connection problems for users with large rosters.
31.023 Jul 2014 21:27
minor feature:
The version number has been synchronized with Firefox because of renewed development progress, and uses the new Australis theme. It also fixes multiple bugs. Autocompletion has been enhanced. And the insecure NTLMv1 authorization scheme has been disabled.