Secunia Security Advisory – A vulnerability has been reported in MIMEsweeper for SMTP, which potentially can be exploited by malware to bypass the scanning functionality.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/35016/sa13160.txt
Source: https://packetstormsecurity.com/files/35016/Secunia-Security-Advisory-13160.html