I think this thread has reached the point of diminishing
returns; while this has been a useful traversal of the
issues that will be useful for future reference, the
participants in the thread are unlikely to succeed at
changing anyone else's mind.
So i'm going to ask participants to take it offline if they
want to discuss it further.
I would further like to declare a moratorium on the subjects
of:
1) whether "-all" is wise or foolish given that verbatim
forwarding may or may not be a common practice,
2) whether (forwarders are responsible for doing SRS) or
(receivers are responsible for whitelisting forwarders).
This argument is summarized on the top right of page 11 of
http://spf.pobox.com/whitepaper.pdf. If you are unable to
view the PDF, please search the archives --- somebody has
kindly put up a web-viewable rendition.
cheers
meng