Thunderbird 138.0
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 138.0 release notes:
What's New
- New mail alert now includes message disposition buttons
- New mail notification customization added to macOS Settings
What's Changed
- Changed color override defaults with high contrast mode on macOS and Linux
What's Fixed
- macOS notifications displayed two logos
- Message preview truncation in notifications improved
- Wrong day of week displayed for some emails
- In dark mode with light theme, message reader still displayed in dark mode
- Message link and text colors were incorrect when using Dark Reader
- Unchecking "Show all headers" in Message Header Settings closed dialog
- Address book did not match users when case differed in some instances
- Menu items to manage folders were not disabled in offline mode
- Using Delete column in "Search Messages..." window could delete other messages
- Ctrl or Shift selecting multiple messages reset when dragging across a message
- Newsgroups could no longer be re-ordered in the folder tree via drag and drop
- Windows users with non-ASCII folder names and profile paths could not view emails
- OpenPGP key was not updated when accepted key was reimported with new identities
- Dual signed (PGP and S/MIME) emails were not displayed
- Notification duration preference enabled when system notifications were enabled
- Thunderbird could crash when adaptive message filtering was enabled
- CardDAV synchronization to Zimbra server failed
- Keyboard navigation was not possible when first header button was disabled
- Folders missing from view when "Show only subscribed folders" was not selected
- Nickserv messages appeared during successful authentication
- Global indexing failed when processing email with invalid calendar data
- Clicking a mid: link in Calendar opened two copies of the message
- Some calendar requests were blocked due to opaque response blocking
- Visual and UX improvements
- Security fixes