clamsmtp: virus action defaults / solutions

I've just gotten clamsmtp going on my linode via aptitude. It was an amazingly simple install. One thing I haven't been able to find, however, is whether it has a default virus action or whether you absolutely have to create a script of some sort. If the latter, are there any premade scripts available? Actually, any input on the virus action option of clamsmtp would be helpful.