Source: tbsync Version: 1.7-1 Severity: important Hi Mechthilde,
it looks like the current tbsync in buster is not directly usable anymore, after thunderbird has been upgraded from 60.x to 68.x. I assume, that just using a newer version in stable might work, but I didn't try yet. First, I just downgraded thunderbird, lightning, and enigmail to their original buster versions: thunderbird 60.9.0-1~deb10u1 lightning 60.9.0-1~deb10u1 enigmail 2.0.12+ds1-1~deb10u1 This works and might be a good workaround for most users. Second, I did an adhoc, local backport of tbsync. This works with the latest thunderbird in buster, as expected. Cheers & stay healthy!