Re: SPF and Google Groups (sending on behalf of)

Alex van den Bogaerdt wrote:

>>  X-Sender: user <at> un.org

> If microsoft's protocol states that X-Sender is more
> important than Sender, then your ISP does the right thing.

LOL, no, Sender ID PRA does not use X-Sender.  And it also
wouldn't check the HELO, as shown in this example.  I think
it was a plain broken SPF check based on the 2822-From, not
on the "X-Sender".

Guessing:  Google wants to protect the mail from Sender ID
PRA confusions, therefore it adds its own Sender.  There
was already an old Sender, therefore Google renamed this 
to X-Sender.  Because the Sender ID PRA "technique" using
a Resent-From in such cases is FUBAR.  

Everybody and everything did exactly the right thing, but
the receiver checked 2822-From instead of MAIL FROM, and
that is obviously wrong.

 Frank