I apologize for the junk messages you've been receiving that's been coming through this list. I'm currently working on a resolution.
I realized that anonymous (non-subscribed) posting was enabled. I've switched that so it only allows messages from registered users (web or email) to go straight through. That should help eliminate the garbage posts.
At some point in the near future we'll likely want to move the list to a server either we control or is managed by a trusted open source supporter (company, foundation or similar).