SMTP Smuggling - a new method of impersonating the email sender

The article discusses a recently discovered problem related to SMTP smuggling, which can lead to email fraud on a global scale. The authors outline how critical flaws in email systems can be exploited by attackers to hide dangerous messages. This technique allows for the transmission of malicious content in a way that is difficult for traditional security measures to detect. Based on tests conducted by researchers, it becomes evident that many popular email servers are vulnerable to such attacks. A key element is the ability to manipulate email headers, which can result in false messages being delivered to unsuspecting recipients. The conclusion of the article provides recommendations for users and administrators on how to protect their systems against these threats and reduce the associated risks.