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Re: dnsbl's? - an informal survey

  • From: listuser
  • Date: Thu May 29 21:34:30 2003

I do on the ISP I consult with.  We use:  (we pay for this)   (we pay for this) (all of it, 8 zones, 3 from outside sources)

And we were using until their hardware failure.  We also 
used to use,, and

Personally I use all of those as well as:

All of those are used to flat out reject spam at the MTA.  I will 
eventually use those on the production MTAs.

In addition to those I listed above, we also score our mail.  On the 
non-production box I'm using all 13 foreign relay DNSBLs provided by 
blackholes, SORBS (all 7 zones),,, and a breakdown of the (formely 
wirehub) lists.

Of this list we get (in one fashion or another) zone transfers of each 
zone (AXFR, IXFR, rsync, or HTTP transfer).  I only use those for which 
that's an option.  Otherwise I'd use ORDB and others.

Is that enough info?  I can provide what I'd call an ideal configuration 
if you want.


On Thu, 29 May 2003, Williamson, Todd wrote:

> A situation recently popped up that prompted a question:
> How many operations utilize any kind of dnsbl (or any other kind of third party
> reporting service) on customer facing SMTP servers?
> (customer facing == end users of your operation's service receive mail there)
> I'm sure legal issues apply; any replies off-list would be greatly appreciated.
> Thanks,
> Todd Williamson
> Covad IP Services
> Covad Security Operations
> (888)801-6285
> [email protected]