SpamLookup can perform IP address lookups with any IP address blacklist service. These services often contain IP addresses of known anonymous proxies which are very commonly used by the majority of comment and TrackBack spammers.

There are three settings for this tests operation:

• Off - This test is not performed
• Moderate - When a feedback item is received with an IP address that is listed with one of the specified blacklist services, the item is left unpublished and awaiting administrator approval.
• Junk - The same as above, except that instead of moderating it, SpamLookup contributes to the item's Junk score, which may, depending on the other scores the item receives, lead to it being marked as Junk.

Junk score weight

For the Junk option, you can adjust the score this test contributes based on your confidence of the test from 1 (least confident, the default) to 10 (most confident).

IP Blacklist Services

You can alter the blacklist services used in the IP address lookups. The default services are bsb.spamlookup.net and opm.blitzed.org.

Recommended settings

The default IP address blacklists are constrantly updated with new and accurate information and thus far have done an excellent job of determining what is and isn't spam. However, IP addresses can change rapidly and new anonymous proxies are created all of the time. In our experience thus far, there is little chance of false positives but may not catch the new proxies.

We recommend that this setting be set to Junk matching items with a junk score weight of 1.