[lug] Responsible Black Hole Lists

Ben bluey at iguanaworks.net
Wed Aug 8 12:22:08 MDT 2007

I use spamhuas.org -- In postfix main.cf, I've got the line:

        reject_rbl_client zen.spamhaus.org

in smtpd_sender_restrictions =

I haven't any problems with false positives. The nice thing about it (as 
opposed to later filtering via spamassassin and the like) is that it 
rejects the e-mail and the sender gets a bounce. If it is a real e-mail, 
then  human will get the bounce and know it didn't go through. I've also 
had great results using helo_required and helo_restrictions and the like 
to reject mail from servers not following the standard protocol. It has 
greatly reduced the spam that my filters have to deal with. For some 
numbers, for every e-mail that gets in (or out, so I'm overcounting 
received e-mails), 1 gets rejected by spamhaus, and 2.2 get rejected by 
helo restrictions and the like. In total, 24% of attempts make it past 
the front door.


George Sexton wrote:
> Does anyone know of some "Responsible" black hole lists.
> The latest bout of PDF spam is killing my bayesian filter and I'd like 
> to supplement it. At the same time, I know that some black hole lists 
> are pretty abusive and non-responsive to the genuinely innocent.
> Is there such a thing as a "responsible" black hole list?

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