As this mailing list is being retired, we take this opportunity to point out that much of Thunderbird's support happens at https://support.mozilla.org/questions/new/thunderbird/form
Other Thunderbird discussions have moved to mailing lists
at https://discuss.thunderbird.net/groups/ where hundreds of
users, testers and developers collaborate on the future of
Thunderbird, hopefully with your help. Here you will find groups
such as Beta and Daily builds, planning,
encryption, announcements, and more.
Regardless of where you engage with other users of Thunderbird,
your support and involvement is appreciated.