J Doe:
> Hi Wietse,
> > On Mar 2, 2018, at 10:15 AM, Wietse Venema <wie...@porcupine.org> wrote:
> > 
> > Perhaps it is time to repeat what postscreen is and is not.
> > 
> > Don't use postscreen to block spam. Use postscreen to block spambots.
> > Those who misunderstand the difference will be disappointed.

For example, all blacksmiths are black, therefore all black people
are blacksmiths.

> > In particular, hotmail is not a spambot, therefore it should not
> > be blocked by postscreen.
> I have been using the following in my /etc/postfix/main.cf:
>     postscreen_dnsbl_sites = bl.spamcop.net, zen.spamhaus.org
>     postscreen_dnsbl_action = drop
> While this weeds out spambots I imagine it is weeding out spam
> sources as well

Postscreen blocks sites based on:

- Their reputation that hey don't send legitimate mail.
  zen.spamhaus.org and bl.spamcop.net are examples of that.

- Their behavior. The postscreen pregreet test is an example of that.


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