Jo Rhett wrote:
But for various reasons many organizations publish wide-open SPF records, and right or wrong those people will still report backscatter to the blacklists.
This is the first time I hear of this being a widespread problem. Can you please contact me off-list and give me some details on which organiza- tions do that? Perhaps the SPF project has to take them aside and have a friendly word or two with them.
In any case, this can be considered an abuse of the blacklists being reported to. For example, the SpamCop blacklist explicitly asks spam submitters to publish SPF records if they receive backscatter, so it is obvious that they aren't supposed to submit bounces as spam that are "legitimate" according to a published SPF record of theirs.