it's a product that "learns"
you have to use the spam button to identify it to them as spam, other users have to agree, new filter rules at the headend get created.
In the meantime you should be using your rules settings, and creating rules to help fight spam.
Here are some best practices that I have posted before, they really help in the reduction of spam.
- You should start reporting the spam with a spam button in the webmail client
- Forward spam emails that were not caught to email@example.com
- Set your e-mail filter. An e-mail filter and spam blocking software are absolutely critical. Set these security measures to update automatically to ensure that you are protected from the latest threats.
- NEVER reply to spam. Replying to spam, even to "unsubscribe," could set you up for more spam.
- Protect your e-mail address and instant message ID. If you must post this information online, set up two identities, one for real use and one for online activities.
- Be wary of e-mail attachments. Change the settings on your e-mail program so that images and attachments are not opened automatically. Only open attachments from users known to you.
- Watch out for phishing scams. Don't click on links in e-mails or instant messages unless the sender is known to you. Instead, open a separate web browser and visit the site directly.
- Create smart and strong passwords. Use a combination of letters, numbers, and symbols.
- Never enter your personal information in a pop-up window. You may not be able to tell when a scammer has hijacked a seemingly legitimate site.
- Don't fill out online surveys, or register for contests or fan clubs. These may be fronts for spammers trying to collect your e-mail address