Thunderbird 139.0

Thunderbird

Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use.

Thunderbird is clean and elegant by default, but easily customizable to match your workflow and visual preferences. It is loaded with unique and powerful features.

Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

Thunderbird 139.0 changelog:

What’s New

Implemented enterprise policy to allow granular in-app notification control
Added 'Mark as Read' and 'Delete' actions to mail notifications
Implemented customizable row count for Cards View in 'Appearance' settings
Implemented ability to manually sort folders in the folder pane

What’s Fixed

Thunderbird could crash when setting message compose headers
Links in the OAuth authentication window did not open when clicked
Access was not allowed to attachments at specific UNC hosts
Mail window could stop functioning during and after folder compaction
Full folder sorting logic was not used when inserting folders after move
mail.compose.other.header headers were not shown in Show All Headers mode
Folder was hidden from Favorite when a subfolder was removed
Folder tree message counts displayed incorrectly under certain conditions
Selection was not restored after manual folder sorting
Dragging a folder to a new parent did not insert it correctly for IMAP folders
Compact View users had all folders expanded after restart
Invite attachments without a name were forwarded as 'Attached Message Part'
Chat settings tab remained visible when mail.chat.enabled was false
Selected folder was not refreshed when applying 'Appearance' Threading settings
'Grouped by Sort' for all folders in 'Appearance' settings did not work properly
Thunderbird could crash if message copying to Sent folder was interrupted
System search toggle did not properly reflect and control integration state
Dragging attachments to desktop from Thunderbird did not work on macOS
Dark mode messages displayed in light mode due to preference setting conflict
Cancelling a post to a news server could fail and remove the article
Thunderbird could crash in NNTP subscription dialog
Newsgroup searches with slashes were not supported with XPAT-enabled servers
Offline newsgroup use lacked functionality needed for effective offline access
Chat accounts could not be deleted
Reminders missed for all-day events when calendar.alarms.showmissed was false
Access to multiple CalDAV calendars was not possible
Visual and UX improvements
Security fixes