[Asrg] FeedBack loops

[Steve Atkins]

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.

Sending of feedback loop reports is done by the MUA (for a fairly  
loose definition of MUA) and the handling of them is done by custom  
code that knows how to count and unsubscribe based on the reports -  
the ARF specific code in both cases is a trivial fraction of the whole  
application.

The MTA doesn't really get involved at all, other than to ship the ARF  
report around as an opaque RFC2822 message

Cheers,
   Steve