My personal heroes and projects I admire are @signalapp @Mer__edith @torproject @gnome @thunderbird @ryanleesipes . I’d much rather have Mastodon be inspired by the contributions of these people and projects to the FOSS and non-profit technology world than trying to rebuild early Twitter. (5/13)

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. Additional features, like calendar and address book, are in the works! #thunderbird #exchange […]

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 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/

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/

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 * diving back into the Calendar UI Rebuild * and more! #thunderbird #opensource […]

In-person and virtual community initiatives, adjusting the Android roadmap, and the journey to true Conversation View and why it's hard, and how an in-person work week helped us get started. Read/watch/listen at the blog: #thunderbird #opensource […]

There's a lot going on in Firefox and Thunderbird land this week! First, we're taking part in Mozilla Support's Ask-A Fox event this week! (https://community.mozilla.org/en/campaigns/ask-a-fox/) Check out how you can get involved and help fellow Thunderbird users on desktop and Android! Second […]

We've got the latest updates on our Android and upcoming iOS apps! Take a sneak peak at the new Android account drawer, iOS account setup and upcoming monthly release schedule. Also, we explain why recent updates affected read/unread message readability and how we're fixing it in the short AND […]

After a short hiatus, State of the Thunder is back! This time, 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 […]

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 find how how to help us make Thunderbird accessible to everyone! #thunderbird #accessibility #opensource […]

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 […]

We'll be at the Austin JavaScript Meetup tonight! 🎉 Come say hi, chat about open source, and connect with the community! #thunderbird #javascript #austin https://www.meetup.com/austin-js/events/310135402/

Curious about our progress on Thunderbird Pro? Our latest update, direct from Managing Director Ryan Sipes, keeps you in the know - and lets you know how to stay updated: #thunderbird #thunderbirdpro #opensource https://blog.thunderbird.net/2025/08/tbpro-august-2025-update/

Thank you to everyone who left us comments and questions on our Accessibility post this Tuesday. We'll gather those up and bring them to our design team when we meet with them later this month to record our next community office hours! #thunderbird #opensource #accessibility

Our regular Development Digest has some exciting updates on features that are nearing completion, in the case of Exchange email support, and are just starting development, in the case of the long-awaited Conversation View. We're also adjusting Account Hub and tackling the usual maintenance tasks […]

For this month's Office Hours, we're talking to members of our Design Team about how we're assessing and improving Accessibility in Thunderbird. We'd love to bring them your questions! Please leave them in a comment to this post and we'll do our best to answer as many as we can in the recording […]

Getting Things Done + labels + keyboard shortcuts = 💙 and an organized inbox. Find out how to get started in our latest Maximize Your Day blog post! #thunderbird #productivity #email https://blog.thunderbird.net/2025/08/maximize-your-day-getting-things-done-with-thunderbird/

Archiving from notifications, warnings about expiring PGP keys, bug fixes, and more! Find out what's in Thunderbird 141.0 (and how you can get it) in our new Monthly Release Recap! #thunderbird #opensource #email https://blog.thunderbird.net/2025/08/monthly-release-141-recap/

We've been doing State of the Thunder, our bi-weekly deep dive into development and roadmap discussion, for a few months now! One common thing we hear is "this info is great! But, can you put it in a blog?" And starting with episode 10, we have. All of the latest Thunderbird updates and […]

We're growing our community team! Thunderbird has been so lucky to have a community that's helped us survive and now thrive, and we want a team that can help everyone who contributes to Thunderbird thrive just as much. Meet the members of the team and learn what they have planned! #thunderbird […]

Our community team has a new video series! "Contributing to Thunderbird" breaks down the barriers to developing, testing, translating, and supporting Thunderbird on desktop and mobile. Our first videos help you build a Thunderbird development environment on your Mac and Linux (specifically […]

Our Community Office Hours is back, and this month we've taken a deep dive into our latest yearly Extended Support Release, Thunderbird 140.0 ESR "Eclipse." We're talking with our Sr. Manager of Desktop Engineering (and introducing our new Manager of Community Programs) and talking about its new […]

Do you have ideas on what might make a more welcoming, exciting and rewarding community experience for Thunderbird users & developers? We're gathering ideas on how to strengthen and improve the Thunderbird community. So, whether you are a long-time contributor or a curious newbie, we would love […]

The latest Thunderbird mobile update is out! We're getting closer to sharable iOS screenshots while sharing a sneak peak at the new Android account drawer and folders. And check out all the improvements from our team and community! #thunderbird #opensource […]

In the latest State of the Thunder, we're introducing our new head of Community Programs and answering your questions about the upcoming Thunderbird Pro suite! We've also been listening to your feedback, and each video now includes a detailed summary, along with our usual chapter breakdown and […]

Our latest Thunderbird Monthly Development Digest is out! We have news about: * The latest ESR, 140.0 "Eclipse" * Details about new Exchange Support features * Updates on Account Hub and the Global Message Database * Features and Fixes #thunderbird #opensource […]

Thunderbird 140 “Eclipse” is here! Our latest Extended Security Release (ESR) has improved visuals, including dark message mode, native OS notifications, a new Account Hub, and even more features to give you total control over your inbox and get on with your day. Read about these and other […]

The latest volume of State of the Thunder is out! We're keeping you updated on our roadmap progress as we look towards Q3, sharing our advice on using Thunderbird developer tools, and giving you a deeper look into the hows and whys of our fundraising model. #thunderbird #opensource […]

If you're heading to Droidcon in NYC this week, so are we! Two members from our Mobile team will be there, so if you see 'Thunderbird' on a name badge, feel free to say hi! We're looking forward to learning, making connections, and sharing our progress in the Android email space! #dcnyc25 […]

Our May Mobile Progress Report shows how we're: *getting ready for JMAP in iOS * planing early for TestFlight * coordinating localization for both apps * asking for feedback with the Android beta * improving the account drawer and more #thunderbird #email […]

Thunderbird 140, our latest Extended Support Release, is due next week! Watch our latest State of the Thunder for a deep dive into Thunderbird update channels. Learn the difference between yearly ESR, monthly Release, and our testing channels, Beta and Daily, how to know which one you're on, and […]

Our latest Thunderbird + Rust Office Hours video is up! In it, @brendan explores how Rust (along with a little C++) is powering our push to provide support for Microsoft Exchange. Learn more and find how to get involved! #thunderbird #rust #opensource https://tilvids.com/w/rqeETZqqEHgnTVWYoGJzx6

You brought your questions to our team, and in the latest State of the Thunder, we're bringing the answers! This discussion covers a wide range of topics, from bringing the new monthly Release channel to Flatpak and Snap to accessibility to UI. #thunderbird #development #opensource […]

Want to know more about Thunderbird Pro, including Thundermail? Our latest Community Office Hours has you covered! We're discussing planned features, answering questions, and getting to know our new productivity suite before it hatches! #thunderbird #opensource #productivity […]

Do you have access to a Microsoft-hosted Exchange account? Exchange support is now available in Thunderbird Daily for testing, and we could use your help making sure it's ready for all our users in a few months. See our post on the Developers' mailing list to learn how to help: #thunderbird […]

Have access to a Microsoft-hosted Exchange account? Exchange support is available in Thunderbird Daily for testing, and we could use your help making sure it's ready for users in a few months. See the Developers' mailing list to learn how to help: #thunderbird #exchange […]

We've been talking a lot about roadmaps for the last four State of the Thunders, and this volume is all about priorities. How do we set them and decide on timing for certain items? How do we make mid-development adjustments? And how do we make sure our priorities are in line with what our users […]

This State of the Thunder is about priorities. How do we set them, line them up with user needs, and adjust as needed? Also, updates on Thunderbird Sync, Thundermail and the Pro suite, and mobile development. Watch the entire discussion on TILvids: #thunderbird #opensource […]

Ever wondered about what MZLA is, how it relates to Thunderbird, and how it works with (but is different from) Mozilla and the Mozilla Corporation? Curious about how we work with the Thunderbird Council, our community governance? Want to know more about our future plans, including the mobile […]

Curious about MZLA, how it relates to Thunderbird and how it works with (but differs from) Mozilla and the Mozilla Corporation? Want to know more about future plans, including Thundermail, and Thunderbird Pro? Watch the newest Community Office Hours with Director Ryan Sipes […]

Heading to #kotlinconf later this week? So are two members of our mobile team! Be sure to say hi if you see them in talks and in the hallway track, and we've even been told @kewisch is bringing some Thunderbird for Android stickers to share! #thunderbird #kotlin

We've had a few iOS updates in the last few Android Progress Reports, but with more substantial iOS news, it's time for a name change! So here's the shiny, new(ish) Mobile Progress Report! ✨ Last month, we published our initial iOS repository, made plans for Testflight and laid out our intended […]

The April Dev Digest is out! Learn about all our ongoing development and find out where you can help us test upcoming features. This month's blog focuses on: * The upcoming Extended Support Release * The Calendar UI rebuild * Exchange support * Account Hub * and the Global Messaging Database […]

It's been a while, but our Thursday Thunderbird Tips are back! And our first post is all about Thunderbird keyboard shortcuts. If you're already using them, awesome! If not, we’ve got a guide to get you started! 🤔 ⌨️ #thunderbird #thunderbirdtips #email […]

If you've ever wondered how we prioritize the front and backend features on our development roadmap - and how we're going to improve on delivering our highest priority items - the latest State of the Thunder has answers! #thunderbird #opensource #development […]

Our mascot Roc is bringing our community a special delivery: a heartwarming wallpaper from illustrator Michaela Martin to brighten up your desktop, laptop, and even your phone. In other words, all the places you can find Thunderbird! #thunderbird #opensource #community […]

Our latest volume of the State of the Thunder is up, and its all about mobile! Learn what's on our upcoming roadmap and how we made it, find out what we're planning for iOS, how our community is contributing (and how you can join!) #thunderbird #Android #ios […]

Our new Account Hub, a streamlined email setup wizard, is in Daily and landing in Beta at the end of April. Learn how our engineers and designers worked together to make it happen, where a similar experience will be next, and get a live walkthrough in our latest Community Office Hours. 🧙 […]