Thunderbird

Everything's coming up roses in Pasadena for @socallinuxexpo.bsky.social! Come visit us in the Expo Hall at booth 221 to chat with our team, learn what we're up to, and grab some stickers from:

14:00-18:00 Today
10:00-18:00 Saturday
10:00-14:00 Sunday

#Thunderbird #SCaLE23x

Illustrating Roc's World: A Spotlight on Michaela Martin - The Thunderbird Blog Design artist Michaela Martin shows us how she expanded our mascot Roc's world and brought it to vivid, illustrated life.

We're excited to shine a light on Michaela Martin, the design artist behind our appeal illustrations. We chat about her background, her process, and how Roc and his world went from first sketches to final drafts. 🎨

#Thunderbird #Illustration

blog.thunderbird.net/2026/03/desi...

Super excited to be speaking at @rustinparis.bsky.social next month!

Catch me talk about recent work I've been doing to make @thunderbird.net's Exchange requests better organised at 3:30PM 🦀

Soon!

Mobile Progress Report: February 2026 - The Thunderbird Blog In the first Mobile Progress Report of 2026, we're going over our plans and priorities for the Android and iOS Thunderbird apps.

And our Mobile Progress Report provides an early look into how development on Android AND iOS (!) will take shape over the coming year.

#Thunderbird #Android #iOS #OpenSource

blog.thunderbird.net/2026/02/mobi...

Thunderbird Monthly Development Digest: February 2026 - The Thunderbird Blog In the first Development Digest of 2026, read reports from a successful FOSDEM, updates on Exchange and Account Hub, Calendar news and more!

We have two new blog posts for your weekend reading! Our Thunderbird Development Digest keeps you updated on our continuing work to polish Exchange email support and the Account Hub, as well as our refresh of the Calendar UI:

#Thunderbird #OpenSource #Email

blog.thunderbird.net/2026/02/thun...

Thanks for the excitement! We're currently working on the alpha, and if you'd like to help us test it, we'll keep people posted here and on the blog once we have features to test!

We're working on this! You can join our design discussions and even participate in user studies on our UX mailing list at: https://thunderbird.topicbox.com/groups/ux

I'm finally giving up on Gmail on Android, here's why Life after Gmail

Get off Gmail, use Thunderbird (and soon Thundermail).

www.androidpolice.com/giving-up-on...

Want to know more about where @mozilla.org is headed? The 2025/26 State of Mozilla is live, sharing our product strategy, vision for the future and a look at some of Thunderbird’s favorite “rebel” developers, builders and engineers. Read here: stateof.mozilla.org

Heading to CHAOSSCon at @fosdem.org? Be sure to check out @linuxflower.bsky.social and Wayne Mery's Lunch and Learn on Thursday Jan 29 at 13:00 on how we're using community metrics and how we can improve!

#Thunderbird #OpenSource #Community

chaoss.community/chaosscon-20...

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

We're about to head on our end of year break to give the team a chance to rest, recharge, and come back in the new year ready to go! We're just as excited to release Thunderbird Pro and Thundermail to our users!

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…

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…

We also have a support article for this as well! Let us know if this helps? https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer

Thanks for the feedback on this! Does this article on profiles help with selecting the storage location for a future profile? https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-thunderbird-profiles

Sorry for the delay in the reply! At this time, we don't have any plans to support BIMI.

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 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...

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...

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...

Sorry for the hiccup with our tag in the previous post! Our thanks again to @ostifofficial.bsky.social for their help with this important audit, which you can again read about in our blog post:

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…

We're grateful for Giving Tuesday, a day to support the organizations and projects you care about!


#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/

Have you tried rebuilding the Global database? We'd recommend doing this first (support.mozilla.org/en-US/kb/reb...) - and improving search is one of the reasons we're modernizing our database!

We've had some conversations around Sieve, so it's on our mind! And like Ryan said, we'll keep all the feedback we get in mind for future decisions about pricing and plans. So thanks for your thoughtful comments!

Woot! We're glad you're excited too - we definitely are excited!

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/

Right now the best estimate is around the time of next year's ESR, so some time around the end of June 2026!

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.

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...