I am running exchange 5.5 with service pack 4, on windows NT 4.0. I have installed all the patches released by microsoft especially during the code red worm attack. Problem is my server is generating random messages and sending them to various sites including yahoo.com, I have received various warnings that I should secure my server from attacked servers. This morning I have deleted over 9000 outbound mails! What could be the problem, PLEASE I NEED URGENT HELP.