On 10/31/06 8:26 PM, "Jeff Macdonald" <jmacdonald(_at_)e-dialog(_dot_)com>
wrote:
On Tue, Oct 31, 2006 at 01:31:08AM +0100, Frank Ellermann wrote:
Alex van den Bogaerdt wrote:
Just so that I don't get you wrong; you are saying here that
MS never looked at RFC 821 "MAIL FROM", only at RFC 822 "From:" ?
As part of the PRA. Thanks to Jeff for the MAAWG report.
Correct, MS just does PRA checking, not RFC 821 MAIL FROM checking,
even though SenderID allows such checks.
Can you be more precise? Are you saying that MS implementations (such as
Exchange) do PRA checks on v=spf1 records instead of MAIL FROM checks, or
are you saying that they do PRA checks on v=spf1 records for Hotmail/MSN?
I'm giving a session on Sender ID and SPF next week at Exchange Connections
in Las Vegas, and if the Exchange Sender ID implementation is broken in this
fashion, I'd like to let people know.
If anyone wants to look over the PowerPoint slides for the previous version
of this session (I gave it last April), it's at:
http://www.3sharp.com/files/deving/exc02.ppt
I would VERY much appreciate any comments, clarifications, and advice. I've
already marked away some time this weekend to update the presentation with
the talking points from the SPF vs. Sender ID page.
--
Devin L. Ganger Email: deving(_at_)3sharp(_dot_)com
3Sharp LLC Phone: 425.882.1032 x 109
15311 NE 90th Street Cell: 425.239.2575
Redmond, WA 98052 Fax: 425.702.8455
(e)Mail Insecurity: http://blogs.3sharp.com/blog/deving/
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