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.
ExQuilla was originally developed by R Kent James. Due to retirement, ownership and responsibility has been taken over by Beonex GmbH. Like Kent, Beonex has also been a long-time core contributor to Thunderbird.
The new homepage is https://www.exquilla.com . Other websites might be outdated.