ietf-smtp
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Re: Fixing graylisting [was TBR]

2007-11-15 13:11:03

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