You should be aware that some of the HTML features available for filter selection are common to all HTML messages, not just spam (i.e. hyperlinks). Selecting one of these features may cause false positives. As you gain experience with the HTML feature filtering options, you will be able to modify the settings based on your preferences. However, below you will find a suggested initial configuration that will enable you to use the HTML feature filter with success.
By selecting the Insert X-Header option, your messages are still delivered. You may want to create a delivery rule that moves such messages to a specific mailbox. For more information, see Using Delivery Rules to Filter Spam.