As the top malware delivery vector and fertile ground for all kinds of fraud, email is the channel where cyber attackers are most likely to compromise their targets. They trick users into clicking on an unsafe link, giving away their credentials, or even carrying out commands directly (such as wiring money or sending sensitive files).

It’s not hard to see why attackers prefer email. It uses a decades-old architecture that wasn’t designed with security in mind. It’s universal. And unlike computer hardware and infrastructure, email attacks exploit vulnerabilities that can’t be patched: people.