Create report by non-activity?
Does anyone know if it's possible to run a report based on something that didn't happen? For example, when someone fills out certain forms on my site, I will get an email with "Conversation with" in the subject. I have those emails get logged automatically into the Insightly system as an Activity and each is connected with a particular contact in my database. So I can run a report that shows which of my contacts have logged "Conversation with" activity emails.
But is it possible to run a report that shows which contacts have never logged a "Conversation with" email? I'm stumped!