Scott Kitterman wrote:
On Sat, 14 Apr 2007 17:58:20 -0400 (EDT) "Stuart D. Gathman"
<stuart(_at_)bmsi(_dot_)com> wrote:
On Sat, 14 Apr 2007, Adrian de los Santos wrote:
There is any implementation of spf that checks the from of the data
transaction ?
No. Sender-ID could have been, but it checks some random header chosen
by the spammer. (Well not random, but using a patented algorithm.)
How can i prevent forged froms on the data transaction ?
Use DKIM. This requires the sender to sign their headers, and publish
a public key in DNS.
Yes, except currently it lacks any way to describe in the protocol any
requirement for a relationship between the signing domain and thr From
domain. Without a reputation system behind it (Stuart this is a hint) it
is even less useful to the receiver than SPF. The DKIM working group is
chartered to deal with this, but not making a lot of progress.
The DKIM working group just completed last-call on the requirements
document for SSP, and that seems like a fair bit of progress to me.
-Jim
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