Format string vulnerability in the SMTP service in IMail Server 8.20 in Ipswitch Collaboration Suite (ICS) before 2.02 allows remote attackers to execute arbitrary code via format string specifiers to the (1) EXPN, (2) MAIL, (3) MAIL FROM, and (4) RCPT TO commands.
http://www.vupen.com/english/advisories/2005/2782
http://www.securityfocus.com/bid/15752
http://www.ipswitch.com/support/imail/releases/imail_professional/im822.asp
http://www.idefense.com/application/poi/display?id=346&type=vulnerabilities