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A: Second, do some tests with Net::DNS to make sure it is resolving names (see the Net::DNS site for examples). A common mistake for client machines (such as Mandrake 9.2) is to have 127.0.0.1 in the </etc/resolv.conf> file – Net::DNS does not check multiple nameservers it appears, so you need to comment this line out for Net::DNS to work. (Anybody with a better solution, other than running a local nameserver?)
Q. Wouldn't it be a good idea to run a local nameserver anyway? So, you can run caching-nameserver to cache blocklist query results.
Q: Does anybody know of a good way to use the cluecentral.net country lists? I'd like to penalize certain countries from which I get a lot of spam and almost no real mail. I can't seem to get it working with multiple countries: http://www.cluecentral.net/rbl/showcountries.php