SCO? Anybody home?

I have been trying to contact the guys at SCO to report a serious vulnerability in their operating system as part of our SSD program, with very little success:

All the emails I send there return with this funny bounce message:

Sorry. Although I’m listed as a best-preference MX or A for that host, it isn’t in my control/locals file, so I don’t treat it as local. (#5.4.6)

A few other emails I sent to people I used to know there, bounced with the same message.

If anyone from SCO reads this post, or you know someone that can help me reach those guys, I would be grateful if you can contact me.