So, we sent out a good 100,000 messages last night and can't seem to figure out why we are allowing ourselves to be relayed through. First, the header:
Received: (qmail 22779 invoked from network); 8 Jan 2014 04:43:10 -0500
Received: from 71-13-77-50.static.aldl.mi.charter.com (HELO...