I have installed a SonicWall Email Security 200 Appliance. I seem to be having some relay issues. SonicWall says “It appears that what is happening, is that there is a zombie somewhere in your network. Zombies are a type of virus that uses your network to send out spam. The anti-virus module of SonicWALL e-mail security is the module that takes care of this kind of issue.”
I think they are unable to find the hole that needs to be plugged so they are finger pointing. I need to validate my suspicions or find the zombie, if indeed it exists. Can anyone help me out?
Thanks so much!