Here's the thought. Assume you have a spider running on your website. Assume this spider fetches webpages 24 hours a day, & since it's running on the websites server it leaves the websites address as the referer. Assume you find an entry in that servers logfiles refered from the control panel for one of the websites pages have been fetched from. Should you send an email to a commonly used address from that domain, such as counting it as a solicited communication ?