petemc: I know what you mean, and no they don't and they care about bean-counting but not about technicalities. The problem is that now I will face potentially all the servers in the world by convincing their spamfilters that my emails are genuine. This is just wrong.
petemc: there are not any standard things to implement? I've done some things, like reverse-dns to match the forward dns, open-relay checks, will continuously keep an eye on the blacklist, am implementing a slow-down mechanism for any client that gets viruses which send emails, etc.