It appears that Ted Mittelstaedt <[email protected]> said:
>Why is this a problem?
>
>I understand a number of years ago when Spamhaus decided to charge they 
>set the former free stuff to report -everything- as spam to encourage 
>people to stop querying them

Really, that's not what they did.  They do forbid queries through public
resolvers like 8.8.8.8 and return a special value that means don't do that.
I suppose some clients might misinterpret it.

They still provide free service but you have to set up an account and
get an access key to use in the queries, which is not hard. (I've done
it.) You get enough queries for a small mail system. If you query more
than that they'll rate limit you and someone will contact you
suggesting you upgrade to a paid account.

Here's the setup instructions for spamassassin:

https://github.com/spamhaus/spamassassin-dqs

R's,
John

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