On Fri, Nov 28, 2008 at 9:06 AM, John Levine <johnl(_at_)taugh(_dot_)com> wrote:
Also, SMTP is store-and-forward and [...] multiple hops.
It was designed that way, for UUCP bang-paths, but in practice for a
very long time now, especially since running open relays began being
poor form, SMTP has been sender-realm systems communicating directly
to recipient-realm systems.
I believe that the requirement "support store-and-forward
transparently" may be safely dropped from the needs of the FUSSP; I
believe that systems that forward without rewriting the envelope
return address are to be considered broken. I therefore prefer SPF to
DKIM, while respecting that DKIM works and does handle forwarding
better.
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