Terry Carmen wrote: > Instead of blacklisting new domains (which is apparently difficult to > do), why not blacklist all .cn domains (or simply all domains) newer > than xxx days? > > If they're older than xxx days and not yet on another blacklist for > sending actual spam, return a neutral response.
How do you determine age? Whois queries really can't be used because of the reasons I mentioned in my previous post. I guess one option is to record the date that the domain was first seen anywhere and then work from that but what about the domains that are rarely used? One of the big problems I see with trying to look at .cn domains in the wild is the lack of data. How many people here deal with a large volume of mail that would have legitimate .cn domains? I seem to remember recently seeing one of the big blacklists not having enough non-english mail to work with. --Blaine
