The sole goal is to get on a person's machine in very silent fashion, disable anti-virus software and then download its bigger brother.

For the average home-user, anti-virus software is a must.

Anti-virus software does nothing to stop a worm,

The Norton Anti-Virus gateway was affected,

As every new breed of virus is conceived, created and released into the wild, another small change is made to the anti-virus software to combat the new threat.

I want to avoid locking people into solutions that work only with Postfix. People should have a choice in what software they want to use with Postfix, be it anti-virus or otherwise.