Sorry there is no message filtering / rules in Aqua.
But I think the right place to do this is on the server, anyway (haha, who cares what I think?)
So if I were you, I'd set up message rules in web mail.
I've been doing it for years with message lists and various notifications in my Gmail account (but then, what does that -- how I do things -- have to do with anything?)
Ok, let me try again:
Thank you for you question, it's very important to us.
Regrettably, AquaMail does not provide message rules / filtering.