Beginning in late 2001, we started receiving vast amounts of junk e-mail (better known as spam) from Korean networks. Some of it was in Korean, a language that nobody here understands, some was in English. Despite repeated attempts to contact system managers to alert them to the problem, we never received even a single acknowledgement to any of our reports.
So, with regret, we have blocked mail from most South Korean networks.
Is the information on our site wrong or incomplete? You don't want us to monitor your blacklist? Or do you operate a similar blacklist? We would like to hear from you!
We keep some statistics on blacklists. Below is the graph for korea.services.net. We test blacklists by asking them to respond to known IP's that are blacklisted and known IP's that can't be blacklisted. Not every blacklist has such IP's, we test them with what is possible. We keep if we get any response or error messages and the response duration. Lower response times are better. These statistics may be useful for email server administrators to pick which blacklist to use.