On Wed, Dec 08, 2004 at 06:47:51PM -0000, John Levine wrote:
If the policy is only "-all", i.e., this domain sends no mail at all,
then the policy is credible. If the policy is anything else followed
by -all, it's not. One of SPF's many problems is that it posits a
model of the e-mail world that is a lot simpler than the real world.
In the real world, there are whole lot of remailers and forwarders,
and no matter how desperately some domains might want to argue that
nobody's allowed to forward, etc., [snip]
This is bogus. Forwarding does not have to stop.
SPF by itself does not make a distinction between forgeries as a result
of "old-style forwarding" and spam, virus, etc.
People claming that the SPF community wants to ban forwarding are
spreading fud, no matter their reputation.
Alex