North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: dnsbl's? - an informal survey

  • From: listuser
  • Date: Fri May 30 15:00:18 2003

On Fri, 30 May 2003, Crist J. Clark wrote:

> Oh, the irony of this thread being initiated by someone with an
> address. ;)
> I don't have an answer for the originator, but this reminded me of
> something about DNSBLs that I've been meaning to ask. Does anyone know
> of a black hole list of dynamic cable and DSL clients? What I really
> want is one that mimics AOLs block list of dynamic IPs.

Pretty much all the dialup lists contain dynamically assigned DSL/cable
IPs as well.

I don't have a problem with rejecting a 56k modem user with one of those
lists.  Even I'm leary about rejecting mail from DSL/cable customers in
the same manner.  Yes they shoud SmartHost to their provider.  There are
lots of times when that isn't feasible.  The most blatent example is those
worthless ISPs that mandate that all mail passing through their MTA claim
to be From and have a Reply-To of the ISP's domain.  Nothing like free
advertising for the ISP, eh?  If I had an ISP like that and I was unable
to switch to one that wasn't an absolute joke, I'd send direct-to-MX as
well, or at least bounce it off of one of my own MTAs.

AOl be damned.  Don't like AOL dictate what you do on your own networks.  
I wouldn't block dynamically assigned broadband IPs.  However I wouldn't 
hesitate a bit about scoring mail off of them.  Adding 1 or 1.5 to the 
score seems most justified in my opinion.