I  was hit with 11 trackbacks last night, i was like wow but all of which were spam, just for promotion of the referring website.

Trackback spam is a growing problem on weblogs; spammers put links to web sites in blog, in an attempt to boost the rankings of their sites. The search engines will start honoring a special tag that lets comments be marked as links that should not count towards a site’s rating.

I found a tool to solve this trackback spam problem- MT-TrackbackAntiSpam

The way it works is fairly simple - if the incoming trackback does not come from the host as stated in the URL, we reject the trackback. For example, if a trackback from url http://online-poker.psxtreme.com/ comes from 194.63.235.156 (an open proxy), then it is likely to be spam. (online-poker.psxtreme.com does not resolved to 194.63.235.156).