Nearly all of the email-based threats like phishing are totally harmless in and of themselves. In order to become dangerous, they require some type of user interaction, whether that’s clicking on a link, opening an attachment, etc. Yet, email remains a highly popular and lucrative attack vector. In fact, phishing ranks as the leading cause of data breaches. What do these two things tell us? Cybercriminals have gotten very good at getting users to interact with compromised messages.