List Spam keeps getting through the filter.
We have Mollom setup on our Drupal site but it seems to be doing little to stop the follow of spam comments, particularly list spam. Previously we were using captcha and we had little to no spam problems. Now we have multiple spam posts per an hour. Is there something that has not been configured properly or does the algorithm need to be be adjusted to catch this type of spam? We'd like to keep using Mollom as its more user friendly than our previous system.
Thanks.

List spam?
What do you mean with list spam? Also, can you share what URL/site you are using Mollom for? That would make it easier to look up what log files I need to investigate.
A few more details
Thank you for responding. The site is imagexmedia.com. By "list spam" I mean blog comments that are full of links to sites for rolex, herbal vitamins etc. I am not sure what the issue is. When I take the text of one of these emails and try to post it myself the filter does not allow me to post it. I am trying this as an anonymous user, just like any commenter would be. Despite getting roughly 100s of spam comments thus far, my Mollom dashboard only shows one or two spam/ham messages for each day. So to sum up, here is what I know:
1) 100s of spam comments are getting posted despite Mollom protection.
2) Mollom does not have a record of these submissions going through.
3) If I try to replicate a spam posting by doing it myself I am not able to post the spam comment.
Obviously something is not lining up here. Any help would be appreciated. Thanks.
I think we may have found the issue
We had customized the submit/preview buttons for the commenting forms. Mollom still worked when we tested the form but there must have still been a hidden form or other way for spam-bots to submit spam. We've removed the submit/preview customizations and things seem to be working fine now. If anything changes I'll update this thread. Thanks.