Select the DNS Zone blacklists you want to use. DNS blacklists are used by SpamCop to identify possible spamming IP addresses or misconfigured mail relays. Only the SpamCop blacklist is run by SpamCop. All others are run by independent third parties with no connection to SpamCop and have their own criteria for who to list. The default selection is to query only the SpamCop list. To potentially stop even more spam, try one or more of the other lists. The more lists you use, the higher the potential that legitimate email will be blocked.

[B]DNS Blacklist              DNS Zone                  Website[/B]
-------------              --------                  -------
SpamCop Blacklist          bl.spamcop.net            www.spamcop.net/bl.shtml
SPEWS level 1              l1.spews.dnsbl.sorbs.net  www.spews.org
DSBL open relays           list.dsbl.org             dsbl.org
Spamhaus Blacklist         sbl.spamhaus.org          www.spamhaus.org/sbl/
South Korea (the country)  korea.services.net        korea.services.net
China (the country)        cn.rbl.cluecentral.net    www.cluecentral.net/rbl/
Nigeria                    nigeria.blackholes.us     www.blackholes.us
Argentina                  argentina.blackholes.us   www.blackholes.us
Brazil                     brazil.blackholes.us      www.blackholes.us
Composite Blocking List    cbl.abuseat.org           cbl.abuseat.org
Spamhaus XBL               xbl.spamhaus.org          www.spamhaus.org/xbl/
SORBS DNSbl                dnsbl.sorbs.net           www.dnsbl.sorbs.net