I just talked to my email host about not receiving emails from ca.org. When he got back to me he said that the email address, "webmaster@conceptart.org" had been blacklisted from the barracuda email filter list service that his server uses.

Not sure what's going on, but I thought I should pass this along.

He also gave me text to send to whoever is in charge. I can send it to whoever needs it, but from what I gather the site managing the list is at:
http://barracudacentral.org/