On Nov 10, 2008, at 8:19 PM, Tony Hansen wrote:
I don't ever expect to see authentication results headers showing up
under From/To/Cc headers.
With Apple mail, one can select Preferences > Viewing > Show header
detail: Custom. Click '+' and type in "Authentication-Results".
Presto, Authentication-Results will appear when available. It does
not take a major change to this app before people might normally be
viewing this header. Who knows , it just might become popular.
As such, it remains extremely important that this header not be
deceptive. It currently is for Sender-ID and SPF. : ^(
So, can you explain why the local-part of the email-address is
contained in this header, but not the MTA IP address? This is
elevating information having unknown status, while neglecting to
include extremely significant information needed to make subsequent
assessments regarding MTA reputation or ownership. While Received
headers _might_ capture the IP address of the border MTA, it is often
a challenge for the average user to know which header represents the
border MTA. In comparison, finding a single Authentication-Results
header is child's play.
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