Buffer overflow in the LDAP component of Ipswitch IMail 7.1 and earlier allows remote attackers to execute arbitrary code via a long "bind DN" parameter.
http://www.securityfocus.com/bid/4780
http://www.iss.net/security_center/static/9116.php
http://archives.neohapsis.com/archives/bugtraq/2002-05/0172.html