You may want to adjust the sensitivity of your Katharion spam filter.  By default, we set your spam filter to "High".  The "High" level captures roughly 98% of the spam messages you are sent.  You can adjust higher or lower by following these steps:

• Login to your Katharion spam filter.
• Under "Message Handling" on the left, select "Set Default Spam Handling"
• Under Section 1 (Aggressiveness), choose the best setting for your needs.