What tool was used by James to test employees' susceptibility to social engineering attacks?

James used OhPhish to test employees' susceptibility to social engineering attacks. OhPhish is specifically designed for simulating phishing attacks and training employees to recognize and respond to them effectively. It provides a controlled environment where employees can experience realistic phishing scenarios. This helps organizations assess their workforce's readiness against social engineering attacks and identify areas that may require additional training or awareness programs.

In the context of the other tools, PhishTank is primarily a collaborative database of phishing sites and does not simulate attacks. SpamAssassin is focused on detecting and filtering spam emails rather than training employees on phishing threats. MailScanner is a mail scanning tool that helps protect against malware and spam but does not provide the specific training and simulation features that OhPhish offers. Therefore, OhPhish stands out as the most appropriate choice for testing susceptibility to social engineering attacks.