[Asrg] FeedBack loops

[Chris Lewis]

Steve Atkins wrote:
> On Nov 11, 2008, at 3:24 PM, Franck Martin wrote:
> 
>> Yes it is a simple process, I was just thinking of having that  
>> process as a ready in-built engine, or third-party engine in MTAs.  
>> For the moment as said it is mainly custome code. If such  
>> capabilities would be available in sendmail or postfix, that would  
>> allow fbl to be implemented by large organisations (like  
>> universities, etc...) easily.
> 
> ARF is pretty much unrelated to the MTA.

Well, you could certainly envisage an ARF implementation directly tied
into a filtering MTA that fires off an ARF for every spam it can
identify if it can figure out who to send it to.

However, given the volumes that even merely medium sized MTAs see, and
at least some possibility of false positives, even if it didn't blow the
ARF-recipients off the air, the volume and potential problems would
render it useless.

It just don't scale.