Thank you,
dbowdley, that's all we can ask for.
Actually, I'm in the process of setting it up on my inhouse dovecot server. Since my dovecot set up is plain vanilla, it's just a question of finding the time to add the plugins and rules to the configuration (and not horking a working server as an unintended consequence while I'm at it).
Thank you, again.
--
Jacinto