It looks like my other address (the one for the company I work at that actually hosts the CentOS mirror) is being rejected by the mailing list (though I am subscribed and do get the messages).
Our outgoing mail comes from one of these IPs: 209.67.253.30 208.69.228.58 72.249.147.169
If we could get those unblocked, that would be excellent.
-- Douglas A. Kuntz | Manager Complex Applications & Systems Netriplex, LLC P: 828-650-8528 | C: 828-280-1395 | W: Netriplex.com