Nextcloud mail app config error

Maybe disabling shared mailboxes is the safest way without changing anything.

The doveadm command just sets an additional read right for the Public folder. I don’t think that any client has a problem with that.

doveadm acl set -A Public authenticated lookup should reset the Public folder permissions as they were before.

https://wiki2.dovecot.org/Tools/Doveadm/ACL

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