CVE-2006-3215
Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to bypass the "text analysis", possibly bypassing SPAM and other filters, by sending an e-mail specifying a non-existent or unrecognized character set.
Date published : 2006-06-23
http://www.securityfocus.com/bid/18584
http://download.mimesweeper.com/www/TechnicalDocumentation/ReadMe_MSW_4,3,20.htm