Thunderbird just pushed out version 145, and this one feels like a crossroads moment for the beloved open source email client. The headline change is pretty blunt. The project has officially stopped shipping 32-bit Linux binaries. That era is now over. And in a bit of symmetry, Firefox also dropped 32-bit Linux support this week. Losing both in the same stretch really drives home how quickly the Linux world is moving past legacy architectures.
The update is not just about endings. Thunderbird is leaning into a future where modern protocols sit at the center of email. This release brings full support for Microsoft Exchange through Exchange Web Services. That is a major shift for people who have long wanted to ditch Outlook without losing access to corporate mail. The team also added DNS over HTTPS and new manual setup options inside the Account Hub. It is clear Thunderbird wants to stay relevant for both privacy focused folks and workers trapped in big tech ecosystems.
The changelog is absolutely packed. There are dozens of fixes across account creation, IMAP behavior, UI quirks, and accessibility issues. Users should see fewer missing folders, fewer authentication failures, and fewer messages being re downloaded on every launch. Even the spam button finally behaves properly. Thunderbird has been trying to clean up the Account Hub experience for months, and this update continues tightening all the screws.
If you are a Linux user on modern hardware, this is an easy upgrade that pushes Thunderbird further into pro level territory. Just do not expect any more 32-bit builds. That train has left the station, and with Firefox joining the exodus this week, it is clear the desktop Linux landscape is changing fast.
