On 7/29/2011 11:02 AM, Barry Leiba wrote:
What it does is allow you to assure yourself that the message was,
indeed, from an IETF mailing list (well, from an IETF email server),
and that it wasn't that someone tried to spoof that. That, in turn,
allows you to confidently increase your trust that the message is not
spam in proportion to your confidence in the IETF's spam-filtering
capabilities.
Some of us, at least, find that useful. Some of us might even
completely white-list IETF-signed messages. You can make your own
choice on that.
An intermediary that signs messages and has a reputation for carrying spam in
its stream will have an appropriate reputation. One that signs messages and has
a clean message stream will also have an appropriate reputation.
The differences between the two will produce very different disposition at the
delivery site.
All of which is cleaner and safer than is possible today, except with
constrained uses of previous-hop IP(v4) addresses.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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