Re: Fixing graylisting [was TBR]

At 10:02 15-11-2007, Douglas Otis wrote:
The TBR extension can:

> 1) without burdening the receiver
>
>  a- provide a valid identity of origination
>
>  b- eliminate back-scatter
It may eliminate backscatter but it introduces a new problem, i.e. it 
can be used to stage  attacks using HTTP.
> 5) protect valid email-address confidentiality
See Section 7.6 of RFC 2821 about information disclosure in message forwarding.

Regards,
-sm