I think this should be RC for Wheezy as libspf appears to completely lack IPv6 support. $ spfqtool -i 2607:f0d0:3001:aa::2 -s scott@mailout03.controlledmail.com -h mailout03.controlledmail.com SPF short result: fail SPF verbose result: policy result: [fail] from rule [-all] RFC2822 header: Received-SPF: fail (mailout03.controlledmail.com: domain of scott@mailout03.controlledmail.com does not designate 2607:f0d0:3001:a as permitted sender) receiver=mailout03.controlledmail.com; client_ip=2607:f0d0:3001:a; envelope-from=scott@mailout03.controlledmail.com; It seems to fail to handle IPv6 IP addresses at all, as a result, legitimate mail sent from IPv6 addresses could be rejected (data loss). Scott K
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