We have received numerous emails asking users to scan a QR code to get to a phishing page directing them to enter credentials. The email is nothing but a picture of a jpeg. Is there a way to restrict or block email that do not have text in them?
Thank you for this information. We created a dictionary rule and added both of these expressions. We made a quarantine list for emails with these expressions. Every email we started to receive was getting put into these quarantines, whether they were...