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 150.0 changelog:
New
- "Recent Destinations" in General Settings now supports alphabetical sorting
- Added support for generating Unobtrusive Signatures (OpenPGP)
- Message body search enabled for OpenPGP and S/MIME encrypted messages
- Account hub is opened on the first run of Thunderbird
- Address book cards can be copied to the clipboard as vCard
- Custom Accent Color can be chosen in Appearance Settings
- Calendar month/multiweek views are now scrollable with touch screen
- PDF pages can be reorganized directly in the PDF viewer
Changed
- Flatpak beta app ID changed from org.mozilla.Thunderbird to org.mozilla.thunderbird
Fixed
- Unknown command-line arguments passed to Thunderbird did not print warning
- Thunderbird could crash when creating a folder
- Saved email filenames were not not always cross-platform safe
- Compose progress dialog used unlocalised folder name
- Clicking on a folder in the folder pane did not always open folder
- Could not scroll to message bottom or view all attachments in some cases
- Accounts could be listed twice after adding new account
- Account Hub manual configuration was missing OAuth2 option
- Microsoft Store installs did not open when clicking "news://" link or .eml file
- Folder states were not exposed to screen readers in saved search properties
- Mailbox name was not announced and message count was incorrect for screen readers
- POP3 could stop downloading mail until restart
- Exchange servers/clients caused memory leaks by holding mutual references
- Authentication could fail for some exchange accounts
- "Move to New Window" option for the calendar was disabled
- Calendar view had date and time axes swapped
- Visual and UX improvements
- Security fixes
Download: Thunderbird 150.0 for Windows (EN/US) | 32-bit | ~70.0 MB (Open Source)
Download: Thunderbird 150.0 for Mac OS (EN/US) | 142.0 MB
Download: Thunderbird 150.0 in other languages
View: Thunderbird Website | Screenshot | Release Notes