Phishing schemes are still one of the most serious threats to companies. Even internet giants like Google and Facebook got duped out of $100 million through an email phishing scheme when a hacker impersonated a computer-parts vendor.

According to the FBI, criminals made off with at least $676 million last year thanks to so-called business email compromise campaigns, which are attacks designed to trick company executives or accounting departments into sending money to fake vendors.

One reason email scams work so well is because everyone uses email, says Patrick Peterson, the founder and CEO of Agari, an email security company based in San Mateo, California. "Email's original sin is this: Anyone can send anything to anybody and there's no way to see if the link, or the attached spreadsheet, is malicious," he says.

Please select this link to read the complete article from Inc.