The next time you want to send a Campaign, just remember that subscribers can sign up multiple times using your form(s). This means you’ll have the most current information possible for triggering future email messages. In order to distinguish between new and returning visitors, make sure they’re directed in one of two ways: The first option is an Already Subscribed page where those who are signing up again will be redirected. The second option would direct them back into their original submission form (since this person has already submitted) or prompt them with a confirmation message asking if they’d like to resubmit themselves as well - all depending on how often these people typically return.