It's from the pre-web internet of usenet, smtp and uucp in the 1980s.
Back in the deep dark past of bang email addresses and HOSTS.TXT when all Australian email addresses had !munnari at the end and everyone knew about !decvax and how to connect to it.
Back in the deep dark past of bang email addresses and HOSTS.TXT when all Australian email addresses had !munnari at the end and everyone knew about !decvax and how to connect to it.