Looking for Network Solutions mail admin

NANOGers, We're getting the run around from Network Solutions e-mail front-end support personnel and only canned replies from the postmaster, with no escalation available because we're the sender (i.e. not paying). Basic problem is that we have a client mail gateway that is unable to send mail to a particular netsol-hosted domain; acts like an RBL issue, even though the IP is squeeky clean. Can a NetSol email admin with some clue drop me a line? Thanks in advance -- Randal