Bullguard spam filter is horrible. Horrible at filtering spam. It is better at filtering spam than not filtering it at all, but not by a lot. I installed it after reading a recommendation here at About.com. It installed fairly easily. It offers a minor amount of integration with Outlook Express (the e-mail client I'm using), amounting to some extra buttons in the toolbar. I then trained it with hundreds of e-mails, both spam and non-spam. I carefully sorted e-mail into these categories and went through the prescribed training process. Bullguard didn't learn much. I don't know if the issue is with the ""community"" aspect of the filtering, or the training, but it catches so little spam that it is essentially worthless. The statistics it provides are: out of 1065 scanned e-mails, 19 were filtered as spam by Bullguard. That's after training. Of those 1065 e-mails, more than 1000 were actually spam. That's less than a 2% success rate. 2% success is a miserable failure no matter how you measure it.