Starting this week, I have had a few attempts by spammers to send using my lists. My guess is a staff member somewhere on my campus got some sort of virus, and the names of some of the lists got out. The webUI is behind a firewall and not
accessible off campus, so, it likely isn’t coming from that angle. I also have the lists set up to require confirmation to send, well the ones not used as a discussion list, anyways. And most of them are set to only have certain people authorized to send,
aside from the discussion lists. Is there a way to set it so that only addresses from a certain domain can send? Any other spam controls that would be recommended?