As intuitive as Outlook rules are, some junk mail will always make its way past the filter. While you can simply delete each message, you can identify messages as junk and keep them out of your inbox permanently.

To mark a message as junk, right click the message in the preview pane and locate the Junk option. From there, you can select a variety of options – including Block a Sender, making sure those emails do not continue to clog up your inbox.