OT: RoadRunner Blacklisted, Blocking Bounce Messages!

After getting a number of "Are you still alive?" messages from various friends on the web, and having sent similar messages to them when I received no response to other e-mails, I made an infuriating discovery. RoadRunner is listed in several blacklists (dsbl.org for one), and a number of ISPs are blocking e-mail from their domain (at least from RoadRunner Nebraska - nebr.rr.com). RoadRunner's response was to fix the open relay and get delisted, right? Nope. Their response was to state that they "don't negotiate with blacklists" and promptly _blocked_ all mail from dsbl.org to RoadRunner users. Hence, I would send e-mails to my friends, they would be bounced due to the blacklisting, and I would have no indication of a problem because RR's block would prevent the "bounce" message from getting back to me. Bastards. At least one person I was corresponding with is no longer speaking to me because they thought I was ignoring them. I'm about ready to start a class action suit, although they probably have something in the fine print that prevents that. GRRR!