RBLs are useful, but there are a few that are not what they appear to be. The particular one in question, UCEPROTECT is a) not worth paying b) should never be

RBLs are useful, but there are a few that are not what they appear to be. The particular one in question, UCEPROTECT is a) not worth paying b) should never be used by a production mailserver to block messages. From the beginning there have been enterprising RBLs that are clearly overbroad, and offer to accept money. The money is not for getting off the list, it is always for something else so as to appear legitimate and a side effect is getting your domain off the list. This model is unethical at best, and is right up there with companies that snail mail over-priced domain renewal notices.