It's just like Outlook, both have built-in spam controls, and it uses adaptive filters as defined by you. So, when you first run it, it will be as bad as you have it now. But once you start marking items as junk, it will pick up a lot of junk mail, and probably cut it down to about 75%. You can mark it to move to a junk mail folder or have it auto-delete, or have it marked and saved in your inbox folder.