Director never worked especially well, and for most use cases it's just unnecessarily complex. I think usually it could be replaced with:
* Database (sql/ldap/whatever) containing user -> backend table. * Configure Dovecot proxy to use this database as passdb. * For HA change dovemon to update the database if backend is down to move users elsewhere * When backend comes up, move users into it. Set delay_until extra field for user in passdb to 5 seconds into future and kick the user in its old backend (e.g. via doveadm HTTP API). All this can be done with existing Dovecot. Should be much easier to build a project doing this than forking director.
