Worse than that... it's Sprint Wireless
(http://www.sprintbroadband.com/). I have a machine on their network,
and man does it suck. I signed the longer contract to get the gear for
free because DSL and cable weren't available at that time. Now that DSL
is finally available, I can't wait for Sprint
Sprintbbd is Sprints DSL network.
Received: from cpe-66-87-139-137.co.sprintbbd.net ([66.87.139.137]:3182
helo=www.mynet.com)
The IP address is on several Open Relay lists
http://www.dnsstuff.com/tools/ip4r.ch?ip=66.87.139.137
This is either a misconfigured mail server of some spammers mail serve