Hi. Yes I think that’s another topic. But if it's only failing on Debian Buster then it must be a bug, I and my users use Outlook it's been awhile since I used Thunderbird, so can't really give any insight on this.
If I remember correctly Thunderbird / Lightning integration has been discussed a few times in other threads, actually a quick search in the mailing list shows this as well, maybe one of those can give you some answers? Regards / Hilsen Christian M. Jensen -- users@sogo.nu https://inverse.ca/sogo/lists
