Thunderbird sometimes automatically connects to the Internet. These connections are for routine maintenance, update and security purposes.
Support for Windows XP and Vista has ended.
Primary Password is replacing Master Password. Learn more about why we are making this change.
Thunderbird no longer supports 512 bit (so called US export) keys for TLS connections.
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 102.0.