you can do it through htaccess. or you can try using blacklist to block spam. i believe blacklist can even go through your current comments and check for spam.
how do i do this? please explain i have to goto work but ill check thread when i get back.
http://weblogtoolscollection.com/archives/2004/10/05/wpblacklist-25-released/
just download, follow instructions in the readme, and you’ll be good to go. Doesn’t require any editing of files. Just drop into place, run install and then configure it.
i ran it. but how do i get it to scan the already posted comments for blacklisted items. i added the urls i wanted to the list and they comments are still there.
goto the search function. you should notice a tab near the top. manage-search-moderate. just type in something like poker in the search function and it’ll give back every comment that has that word.