[ietf-dkim] Signalling DKIM support before DATA

[Scott Kitterman]

On Tuesday 08 August 2006 15:45, william(at)elan.net wrote:

> Why would receiver check SSP for MAIL FROM domain when it is not the
> same identity as the one DKIM SSP is based on? Don't mix things up
> if you expect correct results.

As a general rule they wouldn't.  If this is useful at all, it's as a failsafe 
to reduce undesirable rejections of messages that would otherwise be 
rejected.  In my view, even if correct some significant fraction of the time 
(it will be if Mail From domain = From domain) then whatever that fraction is 
is a percentage of undesired rejections averted.

Scott K