hi Andrea,
I believe you hit the bug I reported here:
https://github.com/cyrusimap/cyrus-imapd/issues/2001
version 2.5.11 introduced this bug.
If you can recompile cyrus, you could try reverting these changes to
imap/mboxname.c:
https://github.com/cyrusimap/cyrus-imapd/pull/67/files#diff-3f7e9582b7
Hello.
I'm maintaining several setups of Cyrus IMAPD 2.5.12 on FreeBSD 11.2/amd64.
I'm also using Thunderbird+CardBook on some of them without too many
troubles.
Today, however I tried this on one server where I hadn't used CardDAV
before (but had used CalDav succesfully) and run into some
