Hi,

We are going to set up an environment for our customers where the storage is provided by two servers. First one stores the new emails, second one stores all the others using Dovecot's alternative storage feature (mailbox format is mdbox). The servers are connected via NFS.

If, for any reason, the alternative storage is not mounted, Dovecot will see only an empty folder and due to its self-healing functionality flags for messages stored on alternative storage will be lost.

Is there any way to prevent regenerating indexes (and especially flags as a side-effect) if the alternative storage seems to be completely empty? (like a dummy file in the root of the alternative storage and an option to enable/disable this check)

Thanks in advance, Daniel Marczisovszky