I am just another Brit user of spamcop answering your last queries, hopefully the overstressed regular spamfighters here won't flame me too much.
I take you at face value, that you are not sending spam, that you manage any corporate (bulk) mailing reponsibly, and that you do not have any compromised/trojanised computers in your setup.
Spamcop's setup does not intend to label anybody' s email as spam. All it does is publish a list of mailservers which at some time in the recent past have been traced as the source of unsolicited mails which the recipients have determined are spam. Unfortunately in your case, the hostway mailservers that you use (specifically 126.96.36.199) were put onto this list for a period of time. From what I can see, the reports that led to the listing woould have gone to the hostway admins. If you are the only person that users the server 188.8.131.52, then you have a good reason to ask to see the reports. If however you share the server with other companies less ethical than yourself, then you may have a hard time getting the info.
Some ISPs use the spamcop blocklist as one of their criteria for assessing whether a particular piece of mail is potentially spam. Some even use the spamcop list to block mail and refuse emails coming in from possibly tainted servers. At least you got a reject message. Some ISPs just drop the connection completely, and don't give a reject message back to the sender... now that IS bad!
The legal question comes up here time and time again, and is guranteed to inflame the responses you will get on this forum. The stock answer from the US folk here is (roughly speaking) that free speech is a right, but so is the right not to listen. In email terms, anybody can email OUT whatever they like... but equally anybody can refuse to let it INTO their receiving system.
IN summary, your complaint should be directed:
less at spamcop (who anyway have published several disclaimers telling people not to use the list as a BLOCKER...)
slightly more at the recipient ISPs who are using the spamcop list in an "unapproved" manner, and
even more at hostway (who appear to be either providing resources to both ethical and less ethical organisations, OR are simply not reporting back to their users when the spamcop system makes a report)
What options do you have for the future? The most obvious one is vote with your feet, and move our accounts to an ISP that is less tainted, and less likely to get on any blocklist. I know that is painful, bt it is better than having your business disrupted due to the actions of unethical others.