See here some example from the same email address/user:
Not sure how to do it, technically speaking: since ages there is a gentlemen's agreement about avoiding automatic replies to lists but more than a MUA ignore it. Moodle already makes use of it: probably we need a blacklist to fix the issue ASAP as well as some logics to be discovered first.
Not to mention SPAM on forums coming from "infected" Community users: probably a good spam filter in the mailbox collecting the email replies to forums should be enough.
Besides there are scenarios to be prevented e.g. Google and Yahoo servers seems to add the header: X-Autoreply: yes.