Cross-site scripting (XSS) vulnerability in SmarterTools SmarterMail Enterprise 4.3 allows remote attackers to inject arbitrary web script or HTML via a STYLE attribute of an element in the Subject field of an e-mail message.
http://www.securitytracker.com/id?1019461
http://www.securityfocus.com/archive/1/488313/100/0/threaded