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