Hello,
we are facing issue, we manage the shared folder from SQL table, but it was never working as we have to manage acl permission from the server itself, we want to manage permissions (read or write) from the same application we can share user mailbox but it is written in dovecot documentation that is not supported now, we tried to find a mail client that could manage it at least, but only thunderbird was able to do it (but in version 60) and not more today. We saw that roundcube could handle it but we use rainloop.
It is really not possible at all to manage acl permissions fron SQL like the shared box itself ?
I tried to set acl permissions from old version of thunderbird, when i made modification it tried to update the sharedbox table, i did not see the query executed but as we were working on a view, the update failed. Do you know what it tried to do ?