About this Add-on
ExQuilla is a paid addon and requires a paid license. Keeping ExQuilla working with future Thunderbird versions is a lot of work and ongoing.
Beonex has been contributing a lot of Open-Source software to Thunderbird since over 20 years. This paid addon allows us to pay our rent.
The homepage is https://www.exquilla.com .
Thunderbird 115.3.2 broke ExQuilla due to an unnecessary API change, despite being a security release. ExQuilla 115.4 fixes the problem.