> On May 31, 2019, at 7:45 PM, Wietse Venema <wie...@porcupine.org> wrote:
>
> 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.
I really want to weight against some sources, not block them entirely though...
>
> For the latter, I have used check_{client,helo,sender}_{ns,mx}_access
> to trap mail from different 'domains' that share infrastructure.
>
> Wietse
