After recently upgrading to a new mail cluster with SA 3.3.1, we were 
contacted (at every imaginable POC address) with a solicitation to 
purchase access to utilize the Spamhaus blacklists, or they'll stop 
answering our queries.

We felt the amount of money being asked for was unreasonable, as we felt 
we likely wouldn't see an increase in spam if we turned them off.

So, local.cf got:

score URIBL_DBL_SPAM 0
score URIBL_DBL_ERROR 0
score RCVD_IN_ZEN 0

I think those are the only queries that generate lookups against Spamhaus, 
but I'm not positive.

Regardless, we noticed no increase in spam after disabling these tests. 
I imagine there's lots of overlap on the blacklists.

I think the maintainers of SA should strongly consider defaulting Spamhaus 
to "off". At the very least, it should be better documented how to entire 
disable Spamhaus queries.

They have the right to charge for their data, but I question whether it's 
appropriate for an open-source project to generate sales leads in this 
manner.

Andy

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Andy Dills
Xecunet, Inc.
www.xecu.net
301-682-9972
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