The IMail Client "is provided for those who are administering IMail Server on the NT workstation on which IMail Server is installed. It is useful for reading the 'root' mailbox, working with seldom-used accounts, and testing.". Secunia Research has discovered a vulnerability in the IMail Client, which potentially can be exploited by malicious people to compromise a user's system.

http://www.securiteam.com/windowsntf...Q0070AKAE.html