On iMail Server 5.0 for Windows NT 4.0 SP 6a, a malicous user can read and send emails as any other user on the system. The issue lies in how iMail handles the creating of new email accounts, and how it stores them. Exploit instructions included.
cb49e1323d568f5b7d79148336aa88d62ecb3e572bce33f67d97c57bca63383e