Traditional email protection platforms and appliances sit between a network and the outside world. They filter incoming email to weed out spam and viruses, but are ineffective against advanced phishing and impersonation attacks. The new Barracuda Sentinel email protection platform could be a big part of that solution. Instead of sitting at the gateway, Sentinel connects at the API level to any cloud-based email program like Microsoft Office 365. It integrates with every inbox from a protected organization, giving each one individual attention, whether or not the mail came from outside or the internal network.”]
Source: https://www.csoonline.com/article/3393170/barracuda-sentinel-protects-email-where-others-fail.html