This draft goes to the opposite extreme of the ASP draft and increases
the restrictions for "all" compliance as well. This draft indicates
_ALL_ messages are to include a signature with an i= parameter matches
that of an identity within the From header. This is not the defined
use for RFC 4871.
The ASP approach creates fewer corner cases. At least with the ASP
draft, any risk of misuse remains within the control of a domain to
rectify.
IMHO, unless the SSP draft is changed to comply with RFC 4871, the WG
should consider adopting the ASP draft instead.
-Doug
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