Your smart campaign appears to be configured properly. In fact anyone that clicks a link on your website or a Marketo landing page should be sent the email, since you don't have any other filters specified in the smart campaign's smart list.
You can gain additional insight into what is being tracked by visiting a Marketo landing page and any of your web pages that have munchkin tracking code on them. After doing so, are Visit Web Page activities logged into the Activity Log of your lead record? If not, you may not have the munchkin code properly implemented on your website or the browser may have tracking disabled. The
Marketo isn't Tracking Leads help article explains how to override this.If the Visit Web Page activities are logged, click a link on your website (e.g. a button to request a resource, a navigation control to another page, etc. After doing so are Click Link activities logged into the Activity Log of your lead record? If so, do you see a record of your smart campaign being triggered and trying to send the email?
Finally, are there any campaign members listed when you click the Campaign Members link in your smart list?