Charles Sprickman:
> https://www.team-cymru.com/IP-ASN-mapping.html#dns
> <https://www.team-cymru.com/IP-ASN-mapping.html#dns>
>
> That?s part way there. I can easily find the ASNs I care to penalize. But
> still have to figure out how to do something with that in postscreen?
There is no need to do everything in postscreen, especially considering
that the purpose is to block spambots, which is not the same thing
as blocking all spam operators.
For the latter, I have used check_{client,helo,sender}_{ns,mx}_access
to trap mail from different 'domains' that share infrastructure.
Wietse
