#2 Oct 25, 2006 16:09
This is always a problem. Especially when you want to keep the good comments. So did you get an email for each new comment? If so you can browse through them to look for URLs that are common to a bunch of them, then put that in your antispam tab so it will find the offending matches. BTW if you got hit with stuff.foo.com and thing.foo.com ban .foo.com instead of the subdomain portion. You'll catch more junk that way. Also sometimes they comment with a very specific sentence, so you can catch junk that way. The longer the string of text the better. For example "Thanks webmaster. I will visit your site often!" might net you a bunch of crap comments.
One person who had this issue and didn't mind losing some good comments decided to ban "http:" and be done with it. Almost every spam comment you get will have a URL in it, but often so do nice comments.
Good luck with it.