If you want to create a global spam filter (a filter that is applied to every email account) login to cPanel, scroll down to the email section and then click on "Global Email Filters"
The follow the steps of this tutorial
If you want to create a global spam filter (a filter that is applied to every email account) login to cPanel, scroll down to the email section and then click on "Global Email Filters"
The follow the steps of this tutorial