"SPF is a whitelist (+) and a beigelist (?) and a greylist (~) and a
Spammers use (+), so can?t whitelist based on (+).
Forwarders fail on -, so can?t blacklist based on SPF.
You can only use SPF as an extra flag to help decide if an email is a keeper
I had to switch from ?all to ?all because of forwarders causing some of my
email to be dropped.
Once forwarders work with SPF, or SPF works with forwarders, SPF will have
much greater value, IMO. Then I will be able to use (-all) and expect MTAs
to drop email when SPF returns (-).
[mailto:owner-spf-discuss(_at_)v2(_dot_)listbox(_dot_)com] On Behalf Of Dennis
Sent: Friday, February 18, 2005 5:45 PM
Subject: [spf-discuss] A Good Read
I think apenwarr makes a good argument, but he says that SPF is only a
whitelist. It seems to me that SPF is a whitelist (+) and a beigelist (?)
and a greylist (~) and a blacklist (-).
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