I am currently testing the following IP blacklists running in China.
They have been established by an official Chinese authority and they
seem to be able to catch some spam. However, I have been unable to
find any official documentation (blacklisting policy, response codes
etc.) in English. Has anybody had any experience with them?

The blacklists:
- cbl.anti-spam.org.cn
- cblplus.anti-spam.org.cn
- cblless.anti-spam.org.cn

The whitelist:
cml.anti-spam.org.cn

On Fri, 2 Mar 2007 01:35:25 GMT Erik Warmelink wrote:

| Accepting the subscription request, sending the confirmation request
| and then blocking the confirmation would indeed be unfriendly.
| It could happen, though, when the confirmation comes from
| another IP address (or the IP address started sending spam).
| You've got a point there, mailing list providers should try to not
| block confirmations.

If the IP address, subnet, network, hostname, or domain name is being
blocked for reasons that the blocker determines justifies wholesale
blocking, then confirmations won't be an exception as there is no way
to know that it is a confirmation in advance.

Legitimate bulk mailers need to be sure their network and domain are
not in any way used contrary to the confirmation expectation. That
includes ensuring tha every machine on their network and their ISP's
network are free of spamware zombies and other nasties. That can be
a tall order in some cases.