As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>Visual signatures can be added to PDF attachments opened in Thunderbird
'Copy Message Link' and 'Copy News Link' added to header pane 'More actions'
Accessiblity is improved in various tree views
Added 'Archive' action to mail notifications
Add "Show Full Path" folder pane option for compact view modes
Unified folders now display account color indicator with account name tooltip
Folder copy enabled within mail server accounts and local folders
'Reset Folder Order' option added to folder pane to reset custom folder sorting
Add `mail.useLocalizedFolderNames' to toggle special folder name localization
'Favorites' added as destination for 'Move To' and 'File' buttons
Composer now shows a warning if user's configured OpenPGP key expires soon
Enabled configuration of preferred OpenPGP keyserver via the UI
Add mail.openpgp.load_untested_gpgme_version to load untested GPGME version
Added support for generating Unobtrusive Signatures (OpenPGP)
Implemented option to show only messages without any tag
Message body search enabled for OpenPGP and S/MIME encrypted messages
SecurityDevices enabled in enterprise policies
Enable support for DNS over HTTPS
OAuth login for mail accounts now opens in default web browser
Thundermail services can now be used without installing an add-on
OAuth responses now verify issuer fields and reject missing required issuers
Enable the "Sign in with Thundermail" button in Account Hub
Account hub is opened on the first run of Thunderbird
Account Hub email manual config option added
Enable Thundermail OAuth sign-in with account auto-configuration
Address book cards can be copied to the clipboard as vCard
Enable exporting selected address book cards
Custom Accent Color can be chosen in Appearance Settings
Enable support for Microsoft Exchange via Exchange Web Services
Calendar month/multiweek views are now scrollable with touch screen
Tasks can be sorted by created or modified date
PDF pages can be reorganized directly in the PDF viewer
'Copy Message Location' removed from mail context menu
Read folders are now removed from Unread Folders view
Special folders are now localized based on a restricted set of names
OpenPGP public key no longer attached by default in signed-only messages
Address books are now created in Account Hub
Yahoo, AT&T, AOL accounts migrated to OAuth 2.0 with PKCE for improved security
GMail OAuth updated to use PKCE
Skype has been retired and therefore dropped from Address book IM selection
Removed pref default_supports_diskspace.{HOST}
Removed pref default_offline_support_level.{HOST}
Removed Odnoklassniki chat setup and directed users to XMPP configuration
Use of the string "Junk" has been replaced with "Spam"
Updated about:rights to replace local with hosted url
Stop shipping 32-bit Linux x86 binaries
'Hide completed tasks' now also hides cancelled tasks
Thunderbird could crash when parsing message state
The English string for the Angry emoji was incorrectly named as the Yell emoji
Notification sounds did not respect operating system's do-not-disturb mode
Non-English localized Thunderbird created English special folders on first start
Copying text from some error alerts was not possible
Fastmail CalDAV app password access failed due to forced OAuth regression
Thunderbird could crash in server subscription logic
Could not distinguish folders with same name in 'Recent Destinations' and 'Favorites'
Donation banner stole focus when Thunderbird was running in the background
Unknown command-line arguments passed to Thunderbird did not print warning
Thunderbird could crash when processing new incoming messages
Spam messages triggered new mail notifications before being moved to Spam folder
Web pages with bad certificates displayed as blank
Memory leak after opening New Window from folder pane context menu
Importing a vCard only displayed VCF files in the file picker
Calendar view tabs were not properly keyboard accessible
Ctrl+S did not save PDF attachments opened in Thunderbird tabs
TLS errors incorrectly reported all unknown failures as untrusted certificates
Thunderbird could crash when copying an empty list of messages
Incorrect roaming data directory caused regression on Windows and macOS
Changing to new drafts folder and then back did not correctly restore the folder
Message headers were re-downloaded at every startup
Old IMAP profile migration deleted INBOX and other mailbox files
'Search Messages...' dialog could not be opened outside the email tab
Option did not exist to create new address book under File -> New
Newly created folder was missing under "Recent" when moving a message
Could not compose new message if the folder pane was empty
'Delete' was missing from context menu when multiple IMAP folders were selected
Compacting multiple folders failed and did not compact
Shift-click for 'Edit' button in drafts header view did not work
"Replace All" in Compose did not update plain text until dialog closed
Status bar messages displayed unlocalized folder names or IMAP mailbox names
Saved email filenames were not not always cross-platform safe
Space bar did not scroll in PDF attachments opened from emails
Folder location widget used non-localised name
Empty confirmation dialog when more messages opened in tabs than mailnews.open_tab_warning
Removing tags from IMAP messages could fail and tags reappeared after refresh
Toggling dark message mode did not restore focus and scroll position
'Show remote content' did not display remote content for EML message
Emoji sequences were not properly handled in subject lines
'Delete' button in unified toolbar could delete attachments instead of message
"Repair text encoding" could duplicate recipient and attachments
Some IMAP emails showed current time instead of correct received date
Deleting a single message in folder using 'Group by Sort' failed after CTRL+A
New newsgroups were not added in alphabetical order by default
Sorting by threads only brought threads with unread top messages to the top
News message marked read after NNTP error prevented retrieval from server
'Recent destinations' submenu was not sorted by time of modification
Account column could display incorrect account name
'Tag' submenu of mail context menu could be populated incorrectly
Unified archive subfolders could show wrong names and no messages
Moving saved search/virtual folder under IMAP could fail
New Folder dialog allowed invalid folder creation without a selected parent folder
New/unread messages in collapsed thread were not obvious enough
Pressing Delete on Trash folder could remove it without confirmation
Renaming of a 'unified folder' created a duplicate
Clicking on a folder in the folder pane did not always open folder
Messages nested deeper than 255 levels disappeared from threading view
Performing Delete followed by Undo on thread parent message could corrupt view
Single messages still appeared collapsible after thread members were deleted
Updated threads remained misordered until folder refresh or resort
Global search failed to display inaccessible messages found in local folders
Numeric subfolders were sorted alphabetically instead of naturally
Virtual folder folder-picker showed unlabeled IM account as selectable folder
Some folders showed new mail count prior to receiving mail
Menu Bar -> View contained duplicate accelerator keys
Unified toolbar Spam button did not switch to "Not Spam" when spam message selected
Warning was not logged if mail.openpgp.alias_rules_file file did not exist
Not all headers were signed when creating digitally signed OpenPGP email
When configuring external GnuPG, user was not promted to import public key
"Open and Show" for OpenPGP-signed message (.eml) did not work
Invalidly signed unencrypted emails were indicated as worse than unsigned ones
Reason for revoked certificate was not shown
Apple Mail OpenPGP emails failed to decrypt due to hidden recipient key ID
OpenPGP import of public key with experimental packets failed with unclear error
Opening messages with OpenPGP keys was slow and blocked the UI for large keyrings
OpenPGP key refresh failed when fingerprint lookup returned multiple results
Encrypted Gmail CSE emails with outer opaque S/MIME were not readable
Invalid S/MIME encryption certificate caused misleading send errors
"Search Messages" search did not finish due to unparsable local folders
Search results showed older irrelevant emails before newer exact matches
Filter search on Body missed draft messages containing German umlauts
Esc cleared quick filter pin after changing folder
Thunderbird could crash during local message search
Replying could fail with mailnews.reply_quoting_selection.multi_word set false
Drag-drop of unselected contact inserted wrong or no email address
Changing identity in compose window caused modified draft not to be saved
Shift-click 'Compose Message To' on 'mailto' link did not open in plain text
Reply with selected text lost formatting for HTML messages containing </pre>
Multipart/related attachments were not preserved when editing or forwarding
Forwarded malformed MIME email had empty body and extra attachment
Message compose window was removed from Task Bar after saving as draft or template
Dragging email address between compose windows failed to add recipients
Thunderbird could crash when using Find and Replace All
Compose with PDF attachments opened PDFs instead of creating a new email
Multiple saves while using 'Options' -> 'Send a Copy' resulted in multiple copies
Search for "Attachment" in Settings menu did not find "Files and Attachments"
Add-on account creation did not work with Account Hub
Owl install did not show link to website in Account Hub
Username field did not appear in Account Hub when exchange authentication failed
Account Hub advanced config setup did not include default outgoing config
Disabled inputs could be toggled in Account Hub address book
Users could not disable spinning overlay in Account Hub for email
Account Hub local address book creation could continue with blank name
Account Hub email success messages were not always accurate about config source
Calendar/address book sections were shown in Account Hub when there were none
New password-based Exchange accounts failed to save passwords in login manager
Account hub showed connection security instead of actual authentication method
New identity dialog lacked reply-matching and end-to-end encryption settings
Thunderbird could fail to shut down cleanly during active OAuth requests
Account Hub kept OAuth selected after changing to hostname without OAuth support
Account Hub autodetect wrongly prompted for a password when auth was unavailable
Interrupted external OAuth2 setup required restarting Thunderbird
The default account could be reset after restart if uninitialized
Virtual folders did not update correctly for filtered POP3 messages
'Copy Message to' action in a newsgroup filter did not work
Thunderbird could crash while importing mail thread
Thunderbird did not clearly fail when importing profile from a bad source
Thunderbird could not import profile located at the top level of zip file
'Any Number' was unavailable in address book search with 'Match all of the following'
Contact not found in Advanced Address Book Search if phone number had a period
Thunderbird did not display contact photos in WebP format from CardDAV servers
Opening a vCard (.vcf) from file manager or CLI did not work in some cases
Redirected CardDAV URLs resolved relative URLs against the wrong host
Installations from Microsoft Store did not open when clicking 'mailto:' links
Windows new message notification click did not bring Thunderbird to foreground
Microsoft Store installs did not open when clicking 'news://' link or .eml file
Using thunderbird -compose with double quotes made last email address invalid
Clicking the backspace icon in the quick filter field cleared the input field
Subfolder kept stale accessibility unread count after unread messages were deleted
Moving virtual folder within maildir based IMAP or local folder could fail
Thunderbird could crash when completing folder copy/move
'Edit as New Message' and inline 'Forward' not possible with PGP-signed messages
Various MIME improvements
Forwarding some Apple Mail messages incorrectly attached inline text as a file
Thunderbird could crash when marking all messages as read
Auto-compaction could corrupt database and cause crashes during syncs
'news:' URIs without specific server had incorrect format displayed in status bar
'Mark' -> 'All Read' affected newsgroup messages that had not been fetched yet
Thunderbird could not reconnect to newsgroups after connection loss until restarted
Sending a newsgroup post appeared successful when it had actually failed
Saving a new draft retained superceded version
Thunderbird hung when auto-checking multiple accounts for new messages
Spam not checked with mail.server.default.check_all_folders_for_new on
Startup could be slow with large number of folders not using subscriptions
Saved search in unified folder resulted in server error
Thunderbird did not report refused POP3 connection
Remove message body retention policy was not functional
POP3 could stop downloading mail until restart
With auto-mark-read disabled, large mail still marked as read during load delay
IMAP "Show only subscribed folders" could not be changed without restart
POP3 deadlocked when server went silent without closing socket
Thunderbird could crash when mail folder was renamed or moved
NNTP server with invalid TLS certificate could not be added to certificate exceptions
Cancelled message send could not be retried and hung with SMTP timeout errors
Corrupted NNTP account data caused excessive memory use and startup crash
Multiple selected IMAP folders could not be moved or deleted together
Non-Latin IMAP keywords were lowercased and encoded incorrectly as MUTF-7
Message tags were lost when moving folder from local folder to IMAP folder
Removing a chat account threw an exception and failed to clear the UI
Enterprise policy use not indicated in about:preferences with link to about:policies
Language field in settings was empty after restart in Troubleshoot Mode
Primary Password policy was detected but not enforced for saved account passwords
Archived RSS feed messages were sent to the archive folder of default identity
Broken feed icon could prevent updating of feeds
Task reminders could fail for tasks without end dates or with shifted due dates
Calendar did not alert user for connection issues
Copying one recurring event occurrence failed to set the date when pasted
Could not copy an event in multiweek or month view by drag-and-drop
Duplicate attendees were added to invitations instead of being filtered out
Calendar discovery with certificate error displayed multiple exceptions
It was not possible to create date-only all-day tasks
Task percentage complete was not preserved separately from status in tooltips
Calendar invites were incorrectly marked processed after calendar sync completed
ICS event comments were not displayed in Thunderbird event details
Dismissed Gmail calendar reminder did nothing and item stayed visible
iCal imports misread unknown timezones as GMT, creating events at wrong times
Could not export local calendar as HTML
Cancelled filter edit dialog closed the message filter dialog
Visual and UX improvements
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>Unified folders now display account color indicator with account name tooltip
OAuth login for mail accounts now opens in default web browser
Thundermail services can now be used without installing an add-on
OAuth responses now verify issuer fields and reject missing required issuers
Removed Odnoklassniki chat setup and directed users to XMPP configuration
Ctrl+S did not save PDF attachments opened in Thunderbird tabs
TLS errors incorrectly reported all unknown failures as untrusted certificates
Thunderbird could crash during shutdown
Thunderbird could crash when copying an empty list of messages
New mail alerts incorrectly sized or positioned on some multi-monitor setups
Old IMAP profile migration deleted INBOX and other mailbox files
Space bar did not scroll in PDF attachments opened from emails
'Search Messages' shortcut (Ctrl+Shift+F) failed in standalone message window
Folder location widget used non-localised name
Empty confirmation dialog when more messages opened in tabs than mailnews.open_tab_warning
Removing tags from IMAP messages could fail and tags reappeared after refresh
Folder pane could not be horizontally resized in additional 3-pane tabs
Global search failed to display inaccessible messages found in local folders
Numeric subfolders were sorted alphabetically instead of naturally
Virtual folder folder-picker showed unlabeled IM account as selectable folder
Virtual folders failed to preserve the online search setting
Apple Mail OpenPGP emails failed to decrypt due to hidden recipient key ID
OpenPGP import of public key with experimental packets failed with unclear error
Performance issue when decrypting encrypted messages
Opening messages with OpenPGP keys was slow and blocked the UI for large keyrings
OpenPGP key refresh failed when fingerprint lookup returned multiple results
Invalid S/MIME encryption certificate caused misleading send errors
Esc cleared quick filter pin after changing folder
Dragging email address between compose windows failed to add recipients
Thunderbird could crash when using Find and Replace All
Sending Message dialog got stuck on "Filter complete." after successful send
Compose with PDF attachments opened PDFs instead of creating a new email
Attachments opened via -compose on Windows could use incorrect filenames
Ctrl+Enter opened attachment instead of sending the message
Compose window remained open when delayed sending was enabled
Account hub showed connection security instead of actual authentication method
Account Hub GSSAPI autoconfiguration incorrectly prompted for a password
New identity dialog lacked reply-matching and end-to-end encryption settings
Account Hub manual EWS setup lacked OAuth authentication option
Thunderbird could fail to shut down cleanly during active OAuth requests
Account Hub kept OAuth selected after changing to hostname without OAuth support
Account Hub showed a false error when returning from EWS manual configuration
Account Hub autodetect wrongly prompted for a password when auth was unavailable
QR exports with SMTP passwords generated invalid data for Thunderbird for Android
Message Filters 'Run Now' button remained disabled after filter run or mail check
Redirected CardDAV URLs resolved relative URLs against the wrong host
Thunderbird could crash when completing folder copy/move
Forwarding some Apple Mail messages incorrectly attached inline text as a file
Auto-compaction could corrupt database and cause crashes during syncs
NNTP server with invalid TLS certificate could not be added to certificate exceptions
Sent message in EWS account showed message as unread in the sent items folder
EWS NTLM authentication triggered login failures despite successful syncs
Saving inline Exchange images used incorrect filenames and file types
Cancelled message send could not be retried and hung with SMTP timeout errors
EWS folders failed to show new mail notifications until the folder was selected
Corrupted NNTP account data caused excessive memory use and startup crash
Multiple selected IMAP folders could not be moved or deleted together
Non-Latin IMAP keywords were lowercased and encoded incorrectly as MUTF-7
Message tags were lost when moving folder from local folder to IMAP folder
Reply All button was missing for some EWS messages with multiple recipients
EWS users could not permanently delete individual Trash messages
Removing a chat account threw an exception and failed to clear the UI
Primary Password policy was detected but not enforced for saved account passwords
Copying one recurring event occurrence failed to set the date when pasted
Calendar invites were incorrectly marked processed after calendar sync completed
ICS event comments were not displayed in Thunderbird event details
Visual and UX improvements
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>Reply All button was missing for some EWS messages with multiple recipients
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>SecurityDevices enabled in enterprise policies
One-click account setup for Thundermail accounts
Use 'Add' instead of 'New' for account, calendar, address book creation buttons
GMail OAuth updated to use PKCE
Mail server hostname also checked when detecting address books and calendars
Updated about:rights to replace local with hosted url
'Hide completed tasks' now also hides cancelled tasks
New mail alerts appeared on wrong monitor in three-monitor setup
Spam messages triggered new mail notifications before being moved to Spam folder
Filtered IMAP or NNTP subscriptions were lost after closing Subscribe dialog
'Download Headers' dialog for newsgroups failed to open
Messages nested deeper than 255 levels disappeared from threading view
Performing Delete followed by Undo on thread parent message could corrupt view
Single messages still appeared collapsible after thread members were deleted
Updated threads remained misordered until folder refresh or resort
Non-threaded subject sorting separated 'RE:' replies from original messages
BCC recipients were included in signed email headers
Filter search on Body missed draft messages containing German umlauts
Thunderbird could crash during local message search
Blocked file warning showed without 'Unblock File' button in compose window
Forwarding/Redirecting Exchange messages failed with NS_ERROR_OUT_OF_MEMORY
Compose window closed early and send progress dialog hung after NNTP failure
Compose window stayed open after sending when mailnews.sendInBackground set
Microsoft OAuth2 failed when HTTPS localhost redirect was not intercepted
Pasting contact photos stopped working when photo button had focus
Filter dialog lacked focus ring and had poorly distinguishable buttons
Subfolder kept stale accessibility unread count after unread messages were deleted
'Edit as New Message' and inline 'Forward' not possible with PGP-signed messages
Various MIME improvements
EWS messages could go missing from folder view
IMAP "Show only subscribed folders" could not be changed without restart
Unable to delete more than 1000 messages at a time on Microsoft 365
EWS folders in Trash were moved to Trash again instead of being hard deleted
IMAP notifications repeated for emails read on another device after sleep wake
POP3 deadlocked when server went silent without closing socket
Calendar acceptance no longer distinguished between single occurrence and series
Transparent popups on macOS made calendar event editing difficult
Duplicate attendees were added to invitations instead of being filtered out
Task percentage complete was not preserved separately from status in tooltips
Visual and UX improvements
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>There are no Thunderbird changes requiring release notes in this release
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>Forwarding/Redirecting Exchange messages failed with NS_ERROR_OUT_OF_MEMORY
As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla
]]>