[NTLUG:Discuss] How does MAPS RBL work?

[joseph beasley]

The queries are direct to their dns server.  If you are using sendmail,
there are options for RBL servers.  When sendmail receives a messages
it does a lookup for the ip address of the sending mail server on the
MAPS dns server.  

You do not have to change the dns server on your mail server.  You do
have to change your sendmail.cf so that it knows what RBL to use.

--- Neil Aggarwal <neil at JAMMConsulting.com> wrote:
> Chris:
> 
> > I did some digging.
> > First, they offer two types of server, as I kinda said in my 
> > original reply. one
> > is query, the other is zone transfer.
> 
> I am more interested in offering the direct query approach.
> 
> > Their query option is just that, a direct query.
> > You make a good point about your primary DNS server doing the 
> > query of the
> > authoritative DNS server on behalf of the client and 
> > returning the results.
> > However, the contract that MAPS has you complete only asks 
> > for your mail server
> > IP address. This tells me that your IP address must ride on the UDP
> > communication for DNS queres.
> > That fact of the matter is that the IP address of the mail 
> > server must be
> > getting to the MAPS dns server so they can verify 
> > authenticity. There is no
> > documentation that tells you that you must change the primary 
> > DNS server of your
> > mail server to their server. I can't believe they would have 
> > you do this anyway,
> > because they have 5+ DNS servers running across the world for 
> > disaster recovery.
> > This would make a painful maintenance effort.
> 
> This is exactly the question:  How do they force the mailserver
> to make a direct query to their DNS servers?
> 
> > Here are some links for ya.
> > http://mail-abuse.org/feestructure.html
> > http://mail-abuse.org/rbl/usage.html
> 
> I appreciate your efforts, but I read thru those before
> posting this thread.  They don't answer the question at hand.
> 
> Thanks,
> 	Neil.
> 
> 
> --
> Neil Aggarwal, JAMM Consulting, (972)612-6056, www.JAMMConsulting.com
> FREE! Valuable info on how your business can reduce operating costs
> by 
> 17% or more in 6 months or less! =>
> http://newsletter.JAMMConsulting.com
> 
> 
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Joe Beasley
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