ExQuilla License Expired Your ExQuilla license has expired. (This message appears once in an info bar in Thunderbird when the ExQuilla addon license has expired.) See also License Frequently asked questions. Have more questions? Submit a request 2 Comments Date Votes 0 Aleksandrov Artyom February 20, 2014 09:03 Hello, I'm happy to found your addon. I've used it for some weeks and wish to ask your about corporate license for one domain. How much it may be cost per year/unlimited? It's not big email domain - about 60-70 thunderbird users. Thank you. 0 Ben Bucksch July 02, 2019 01:25 Aleksandrov, you can purchase domain licenses at exquilla.com. Please sign in to leave a comment.