We are beginning to leads that appear to respond to email, by clicking links, but we are seeing no other activity (2300 leads)
Since this isn't a small number of leads, we begin to wonder if there is a new form of spam filter that might be testing links in a safe environment before allowing mail to be delivered to the recipient's in box. Could this be possible? All these leads are part of a set of historical records we pushed into a new nurture stream, so they are regularly getting mail. It just doesn't make sense someone click large numbers of email and not ever fill out a form, download an asset, visit a webpage -- or anything else.
Anyone else seeing this kind of thing?
Could there be a new form of spam protection that is clicking through links in a sandbox?