Please join us for our upcoming Thunderbird community office hours on November 29, 2023 at 18:00 UTC. The new office hours format will feature a key Thunderbird guest to talk about the area they specialize in, and open the floor to questions from you!

If you recently upgraded to Thunderbird 115 and noticed a smaller font size or a presentation that feels too compact, here’s how to fix it!

A change was made in Thunderbird 115.0 that rejects the use of the SHA-1 algorithm in digital signatures of S/MIME emails. Read more to learn about this important change, and how it might affect certain users.

We always want to keep our users informed and safe. In light of recent ransomware masquerading as Thunderbird, it’s the right time to review the list of trusted places you can download and install Thunderbird from.