Hi John,
At 18:30 16-11-2007, John Leslie wrote:
It may be worth noting that sender address rewrite should not
be done when forwarding a message via TBR.
That would rule out using SPF then.
(I can't offhand think of a reason you'd actually want to...)
SPF recommends using SRS (Sender Rewriting Scheme) for forwarding.
Regards,
-sm