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David Woodhouse wrote:
You're right -- I don't _have_ to get them to provide IP addresses; I
could try to map the domains to IP addresses myself.
But that would be a complicated and error-prone task, and not one which
I consider feasible for me to undertake. Even if the forwarding domain
publishes SPF for its own outgoing mail, that SPF record doesn't
necessarily match the hosts which will be used for forwarding. I'd
basically be pulling lists of IP addresses out of my wossname.
Forwarder whitelisting should be done based on the HELO identity, not the
MAIL FROM identity.
I had said that before, but you ignored it:
http://archives.listbox.com/spf-discuss(_at_)v2(_dot_)listbox(_dot_)com/200507/0081.html
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