Thunderbird
@thunderbird.net
Thunderbird is an open-source, platform-neutral email, calendar and productivity suite designed for users who value customization, privacy, and control. Available on Windows, macOS, Linux, and Android - Thunderbird helps you stay connected without lock in.
The Thunderbird team is off to rest and recharge, and come back strong on January 5! Until then:
If you need community support: support.mozilla.org
If you need to report a bug: bugzilla.mozilla.org
If you want to suggest a feature: connect.mozilla.org
See you all next year!
#Thunderbird
If you need community support: support.mozilla.org
If you need to report a bug: bugzilla.mozilla.org
If you want to suggest a feature: connect.mozilla.org
See you all next year!
#Thunderbird
December 19, 2025 at 2:00 PM
The Thunderbird team is off to rest and recharge, and come back strong on January 5! Until then:
If you need community support: support.mozilla.org
If you need to report a bug: bugzilla.mozilla.org
If you want to suggest a feature: connect.mozilla.org
See you all next year!
#Thunderbird
If you need community support: support.mozilla.org
If you need to report a bug: bugzilla.mozilla.org
If you want to suggest a feature: connect.mozilla.org
See you all next year!
#Thunderbird
We can't put enough gratitude in the character limit for everything our community has helped us do this year, so we wrote a recap blog. Thank you everyone who made this all happen! 💙 🙌
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
December 18, 2025 at 3:58 PM
We can't put enough gratitude in the character limit for everything our community has helped us do this year, so we wrote a recap blog. Thank you everyone who made this all happen! 💙 🙌
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
It's the last Development Digest for 2025! We're celebrating our Exchange success (but not resting on our labors), sharing our Calendar UI milestones, and grateful for a community contribution to fix a 19-year-old bug!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
December 17, 2025 at 6:41 PM
It's the last Development Digest for 2025! We're celebrating our Exchange success (but not resting on our labors), sharing our Calendar UI milestones, and grateful for a community contribution to fix a 19-year-old bug!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
Exchange email support has landed! We've invited members of our desktop team to Community Office Hours to give us all the details about what's in now and what's coming next!
#Thunderbird #Exchange
blog.thunderbird.net/2025/12/video…
#Thunderbird #Exchange
blog.thunderbird.net/2025/12/video…
December 11, 2025 at 7:16 PM
Exchange email support has landed! We've invited members of our desktop team to Community Office Hours to give us all the details about what's in now and what's coming next!
#Thunderbird #Exchange
blog.thunderbird.net/2025/12/video…
#Thunderbird #Exchange
blog.thunderbird.net/2025/12/video…
Reposted by Thunderbird
We are building tech you can trust.
Thank you to @ostifofficial.bsky.social and 7A Security for their collaboration on the security audit for Thunderbird Send, our end-to-end encrypted file transfer service (coming to everyone soon, open source now).
blog.thunderbird.net/2025/12/thun...
Thank you to @ostifofficial.bsky.social and 7A Security for their collaboration on the security audit for Thunderbird Send, our end-to-end encrypted file transfer service (coming to everyone soon, open source now).
blog.thunderbird.net/2025/12/thun...
Thunderbird Send Security Audit with OSTIF and 7ASecurity - The Thunderbird Blog
As we get ready for the Thunderbird Pro launch, we want every service we offer to be secure and worthy of the trust our community places in us. That means being honest about where we stand today and t...
blog.thunderbird.net
December 10, 2025 at 3:24 PM
We are building tech you can trust.
Thank you to @ostifofficial.bsky.social and 7A Security for their collaboration on the security audit for Thunderbird Send, our end-to-end encrypted file transfer service (coming to everyone soon, open source now).
blog.thunderbird.net/2025/12/thun...
Thank you to @ostifofficial.bsky.social and 7A Security for their collaboration on the security audit for Thunderbird Send, our end-to-end encrypted file transfer service (coming to everyone soon, open source now).
blog.thunderbird.net/2025/12/thun...
Recently we completed a security audit of Thunderbird Send, our upcoming end-to-end encrypted large file sharing service, with the help of the @@ostifofficial.bsky.social and 7ASecurity. Learn how we're making Send worthy of your trust.
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
December 9, 2025 at 10:55 PM
Recently we completed a security audit of Thunderbird Send, our upcoming end-to-end encrypted large file sharing service, with the help of the @@ostifofficial.bsky.social and 7ASecurity. Learn how we're making Send worthy of your trust.
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
#Thunderbird #OpenSource
blog.thunderbird.net/2025/12/thund…
We're grateful for Giving Tuesday, a day to support the organizations and projects you care about!
#Thunderbird #GivingTuesday
#Thunderbird #GivingTuesday
December 2, 2025 at 7:00 PM
We're grateful for Giving Tuesday, a day to support the organizations and projects you care about!
#Thunderbird #GivingTuesday
#Thunderbird #GivingTuesday
Fixing old Android code, integrating with the upcoming Thunderbird Pro, and making a balanced iOS roadmap are all part of our mobile development goals in 2026.
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/12/state-of-the-thunder-14-the-2026-mobile-roadmap/
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/12/state-of-the-thunder-14-the-2026-mobile-roadmap/
December 2, 2025 at 3:38 PM
Fixing old Android code, integrating with the upcoming Thunderbird Pro, and making a balanced iOS roadmap are all part of our mobile development goals in 2026.
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/12/state-of-the-thunder-14-the-2026-mobile-roadmap/
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/12/state-of-the-thunder-14-the-2026-mobile-roadmap/
Thunderbird Pro is getting closer to its Early Bird release! Find out what that means and what it includes in our latest update.
#Thunderbird #ThunderbirdPro #Thundermail #OpenSource
https://blog.thunderbird.net/2025/11/thunderbird-pro-november-2025-update/
#Thunderbird #ThunderbirdPro #Thundermail #OpenSource
https://blog.thunderbird.net/2025/11/thunderbird-pro-november-2025-update/
November 20, 2025 at 4:50 PM
Thunderbird Pro is getting closer to its Early Bird release! Find out what that means and what it includes in our latest update.
#Thunderbird #ThunderbirdPro #Thundermail #OpenSource
https://blog.thunderbird.net/2025/11/thunderbird-pro-november-2025-update/
#Thunderbird #ThunderbirdPro #Thundermail #OpenSource
https://blog.thunderbird.net/2025/11/thunderbird-pro-november-2025-update/
Reposted by Thunderbird
Exchange/Microsoft365 account support built into Thunderbird now!
Thunderbird users have asked us for this for years and now it is here. Enjoy.
For nerds: the architecture built for this opens the door for JMAP support.
blog.thunderbird.net/2025/11/thun...
Thunderbird users have asked us for this for years and now it is here. Enjoy.
For nerds: the architecture built for this opens the door for JMAP support.
blog.thunderbird.net/2025/11/thun...
Thunderbird Adds Native Microsoft Exchange Email Support - The Thunderbird Blog
Thunderbird Exchange support has finally landed for email in the latest monthly release. Find out what's in, out, and still on the way.
blog.thunderbird.net
November 18, 2025 at 3:25 PM
Exchange/Microsoft365 account support built into Thunderbird now!
Thunderbird users have asked us for this for years and now it is here. Enjoy.
For nerds: the architecture built for this opens the door for JMAP support.
blog.thunderbird.net/2025/11/thun...
Thunderbird users have asked us for this for years and now it is here. Enjoy.
For nerds: the architecture built for this opens the door for JMAP support.
blog.thunderbird.net/2025/11/thun...
If your school or workplace uses Exchange for email, accessing it with Thunderbird just got easier! Our blog post has all the details on getting connected and future features.
#Thunderbird #Exchange
https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/
#Thunderbird #Exchange
https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/
November 18, 2025 at 4:10 PM
If your school or workplace uses Exchange for email, accessing it with Thunderbird just got easier! Our blog post has all the details on getting connected and future features.
#Thunderbird #Exchange
https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/
#Thunderbird #Exchange
https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/
It seems like yesterday we released Thunderbird for Android. See how fast our first mobile app is growing up.
#Thunderbird #OpenSource #Android
https://blog.thunderbird.net/2025/11/video-an-android-retrospective/
#Thunderbird #OpenSource #Android
https://blog.thunderbird.net/2025/11/video-an-android-retrospective/
November 14, 2025 at 6:36 PM
It seems like yesterday we released Thunderbird for Android. See how fast our first mobile app is growing up.
#Thunderbird #OpenSource #Android
https://blog.thunderbird.net/2025/11/video-an-android-retrospective/
#Thunderbird #OpenSource #Android
https://blog.thunderbird.net/2025/11/video-an-android-retrospective/
Reposted by Thunderbird
At Mozilla we make tech that puts people before profit. We make tech that is designed to help people live better lives. We make tech that is GOOD.
We’re excited to join the Digital Public Goods Alliance (DPGA) to help expand global access to open, people-first technology. As we face rapid changes in AI and digital governance, strengthening the digital commons is more important than ever.
blog.mozilla.org/en/mozilla/d...
blog.mozilla.org/en/mozilla/d...
Mozilla joins the Digital Public Goods Alliance, championing open source to drive global progress | The Mozilla Blog
Today, Mozilla is thrilled to join the Digital Public Goods Alliance (DPGA) as its newest member. The DPGA is a UN-backed initiative that seeks to advance
blog.mozilla.org
November 12, 2025 at 6:49 PM
At Mozilla we make tech that puts people before profit. We make tech that is designed to help people live better lives. We make tech that is GOOD.
Reposted by Thunderbird
Getting closer to releasing Thundermail, Thunderbird Appointment and Thunderbird Send to the world.
Built on open source and open standards - we're working to make a suite of tools that help people break their reliance on big tech (think Microsoft O365 and Gmail).
Looking forward to sharing more.
Built on open source and open standards - we're working to make a suite of tools that help people break their reliance on big tech (think Microsoft O365 and Gmail).
Looking forward to sharing more.
November 6, 2025 at 12:35 AM
Getting closer to releasing Thundermail, Thunderbird Appointment and Thunderbird Send to the world.
Built on open source and open standards - we're working to make a suite of tools that help people break their reliance on big tech (think Microsoft O365 and Gmail).
Looking forward to sharing more.
Built on open source and open standards - we're working to make a suite of tools that help people break their reliance on big tech (think Microsoft O365 and Gmail).
Looking forward to sharing more.
Thunderbird 144 is out now! Exchange support is closer to officially landing, dragging and dropping your folders is easier, and we're adding new ways to keep your email safe!
#Thunderbird #OpenSource #Email
https://blog.thunderbird.net/2025/10/thunderbird-monthly-release-144-recap/
#Thunderbird #OpenSource #Email
https://blog.thunderbird.net/2025/10/thunderbird-monthly-release-144-recap/
October 21, 2025 at 2:43 PM
Thunderbird 144 is out now! Exchange support is closer to officially landing, dragging and dropping your folders is easier, and we're adding new ways to keep your email safe!
#Thunderbird #OpenSource #Email
https://blog.thunderbird.net/2025/10/thunderbird-monthly-release-144-recap/
#Thunderbird #OpenSource #Email
https://blog.thunderbird.net/2025/10/thunderbird-monthly-release-144-recap/
Not all of our progress is headline worthy! But steady, detail-oriented work, described in our latest development update, is a firm foundation for the next leaps forward.
#Thunderbird #Email #OpenSource
https://blog.thunderbird.net/2025/10/thunderbird-monthly-development-digest-september-2025/
#Thunderbird #Email #OpenSource
https://blog.thunderbird.net/2025/10/thunderbird-monthly-development-digest-september-2025/
October 17, 2025 at 5:55 PM
Not all of our progress is headline worthy! But steady, detail-oriented work, described in our latest development update, is a firm foundation for the next leaps forward.
#Thunderbird #Email #OpenSource
https://blog.thunderbird.net/2025/10/thunderbird-monthly-development-digest-september-2025/
#Thunderbird #Email #OpenSource
https://blog.thunderbird.net/2025/10/thunderbird-monthly-development-digest-september-2025/
What's the topic of Office Hours conversation? Conversation view! From backend changes to in-person collaboration, find out how the Thunderbird team is making it possible:
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/10/video-conversation-view/
October 6, 2025 at 8:21 PM
What's the topic of Office Hours conversation? Conversation view! From backend changes to in-person collaboration, find out how the Thunderbird team is making it possible:
#Thunderbird #OpenSource
https://blog.thunderbird.net/2025/10/video-conversation-view/
In this month's Dev Digest, we're:
* describing the final QA steps as Exchange mail support lands in 144
* discussing future Exchange work
* adding Exchange to Account Hub
* recapping the Conversation View workweek
* and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/thun...
* describing the final QA steps as Exchange mail support lands in 144
* discussing future Exchange work
* adding Exchange to Account Hub
* recapping the Conversation View workweek
* and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/thun...
Thunderbird Monthly Development Digest: August 2025 - The Thunderbird Blog
Exchange is coming to Thunderbird 144 next month! Learn what's in and what's planned. Also, updates on Account Hub, Calendar UI, and more!
blog.thunderbird.net
September 24, 2025 at 5:43 PM
In this month's Dev Digest, we're:
* describing the final QA steps as Exchange mail support lands in 144
* discussing future Exchange work
* adding Exchange to Account Hub
* recapping the Conversation View workweek
* and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/thun...
* describing the final QA steps as Exchange mail support lands in 144
* discussing future Exchange work
* adding Exchange to Account Hub
* recapping the Conversation View workweek
* and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/thun...
In-person and virtual community initiatives, adjusting the Android roadmap, and the journey to true Conversation View (and why it's hard!). All this and more, including a gassy Boston Terrier as a bonus. Read/watch/listen at the blog:
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
State of the Thunder 12: Community, Android, and Mozilla Connect - The Thunderbird Blog
We’re back with our twelfth episode of the State of the Thunder! In this episode, we’re talking about community initiatives, filling you in on Android development, and finishing our updates on popular...
blog.thunderbird.net
September 23, 2025 at 4:36 PM
In-person and virtual community initiatives, adjusting the Android roadmap, and the journey to true Conversation View (and why it's hard!). All this and more, including a gassy Boston Terrier as a bonus. Read/watch/listen at the blog:
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
There's a lot going on in @firefox.com and Thunderbird this week! First, we're taking part in Mozilla Support's Ask-A Fox event! (community.mozilla.org/en/campaigns...) Get involved, have fun, and help fellow Thunderbird users on desktop and Android! (1/2)
#Firefox #Thunderbird #AskAFox
#Firefox #Thunderbird #AskAFox
Mozilla - Ask a Fox event - Mozilla Community Portal
The Mozilla Support platform (a.k.a. SUMO) receives over 20 million visits each month. It’s the go-to place for Firefox users to
community.mozilla.org
September 22, 2025 at 3:50 PM
There's a lot going on in @firefox.com and Thunderbird this week! First, we're taking part in Mozilla Support's Ask-A Fox event! (community.mozilla.org/en/campaigns...) Get involved, have fun, and help fellow Thunderbird users on desktop and Android! (1/2)
#Firefox #Thunderbird #AskAFox
#Firefox #Thunderbird #AskAFox
We've got updates on our Android and upcoming iOS apps! Take a peek at the new Android account drawer, iOS account setup and upcoming monthly release schedule and learn why recent updates affected readability and how we're fixing it.
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/mobi...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/mobi...
Mobile Progress Report - July/August 2025 - The Thunderbird Blog
Mobile Progress Report is back with updates on the Android drawer and visual improvements, iOS mockups, and a new monthly release cadence
blog.thunderbird.net
September 15, 2025 at 3:52 PM
We've got updates on our Android and upcoming iOS apps! Take a peek at the new Android account drawer, iOS account setup and upcoming monthly release schedule and learn why recent updates affected readability and how we're fixing it.
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/mobi...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/mobi...
After a short hiatus, State of the Thunder is back! In addition to tackling community questions, we're also responding to the top 20-ish requested features from Mozilla Connect. Get the latest news on Sync, translations, and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
State of the Thunder: Mozilla Connect Updates - The Thunderbird Blog
State of the Thunder is back for a new season! We're answering more questions and updating you on top requested features from Mozilla Connect
blog.thunderbird.net
September 11, 2025 at 7:52 PM
After a short hiatus, State of the Thunder is back! In addition to tackling community questions, we're also responding to the top 20-ish requested features from Mozilla Connect. Get the latest news on Sync, translations, and more!
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
#Thunderbird #OpenSource
blog.thunderbird.net/2025/09/stat...
Back-to-school seasoning may be winding down, but Thunderbird is seeing where we make the grade (and don’t) with accessibility. Learn about our recent a11y study and how to help us make Thunderbird accessible to everyone!
#Thunderbird #Accessibility #OpenSource
blog.thunderbird.net/2025/09/vide...
#Thunderbird #Accessibility #OpenSource
blog.thunderbird.net/2025/09/vide...
VIDEO: Thunderbird Accessibility Study
In our latest Office Hours, we're covering what's in (and out) of our latest Extended Support Release, Thunderbird 140.0 ESR "Eclipse"!
blog.thunderbird.net
September 5, 2025 at 3:18 PM
Back-to-school seasoning may be winding down, but Thunderbird is seeing where we make the grade (and don’t) with accessibility. Learn about our recent a11y study and how to help us make Thunderbird accessible to everyone!
#Thunderbird #Accessibility #OpenSource
blog.thunderbird.net/2025/09/vide...
#Thunderbird #Accessibility #OpenSource
blog.thunderbird.net/2025/09/vide...
Thunderbird 142.0 has a host of exciting features and bug fixes. From improving the PDF experience to better support for quiet time, learn what's just landed in our recap of the newest monthly release.
#Thunderbird #OpenSource #Email
blog.thunderbird.net/2025/08/thun...
#Thunderbird #OpenSource #Email
blog.thunderbird.net/2025/08/thun...
Thunderbird Monthly Release 142 Recap - The Thunderbird Blog
Our latest monthly release makes resetting folder order easy, lets you sign PDFs, honors 'Do Not Disturb' in native notifications, and more!
blog.thunderbird.net
August 28, 2025 at 2:36 PM
Thunderbird 142.0 has a host of exciting features and bug fixes. From improving the PDF experience to better support for quiet time, learn what's just landed in our recap of the newest monthly release.
#Thunderbird #OpenSource #Email
blog.thunderbird.net/2025/08/thun...
#Thunderbird #OpenSource #Email
blog.thunderbird.net/2025/08/thun...
We’ll be at the @austinjavascript.com Meetup tonight! 🎉 Come say hi, chat about open source, and connect with the community!
#Thunderbird #JavaScript #Austin
www.meetup.com/austin-js/ev...
#Thunderbird #JavaScript #Austin
www.meetup.com/austin-js/ev...
August 19, 2025 at 9:04 PM
We’ll be at the @austinjavascript.com Meetup tonight! 🎉 Come say hi, chat about open source, and connect with the community!
#Thunderbird #JavaScript #Austin
www.meetup.com/austin-js/ev...
#Thunderbird #JavaScript #Austin
www.meetup.com/austin-js/ev...