Re: IP-based reputation services vs. DNSBL (long)

Matthias
Any DNS BL Listing process where those listings are based on complaints 
would create this.

The issue is that if SPAM HEADERS can have the source addresses forged 
then the DNS Blocking systems which were listed in those forged headers 
need to take that into account. So far as I can tell they dont.

Todd Glassey

Matthias Leisi wrote:
> TS Glassey schrieb:
>
>   
>>> 4. effects of DNS caching.  if a host is removed from a blacklist it
>>> should arguably be removed from all caches instantly, but DNS isn't
>>> designed to facilitate that.  
>>>       
>> The use of the term "SHOULD" here has legal implications - since many of
>> these hosts were put into the BL's by Address Spoofing they were in fact
>> NOT where the offensive SPAM was coming from and so placing those hosts
>> there when the real issue is the refusal of the EMAIL Admin to do proper
>> Header Filtration and Validation creates a direct liability.
>>     
>
> I'm sorry to jump in once more. The paragraph above is simply incorrect.
> A DNSBL that would be fooled by "address spoofing" would not provide
> much value. What do you mean by "address spoofing"? Falsified "From:"
> lines?
>
> -- Matthias
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