Qmail /var/log/qmail/smtp error/

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http://serverfault.com – I have this weird error in my /var/log/qmail/smtp/current log. My mail is getting through and working but it is bugging me. I disabled SPF and Domain keys with no luck. Every time I send a message I get this. What's the deal with the (UNAUTHENTICATED SENDER) Does anybody know what that is and how to fix it. @400000004e7020fb184ac1f4 policy_check: remote [email protected] -> local [email protected] (UNAUTHENTICATED SENDER) @400000004e7020fb184ac9c4 policy_check: policy allows transmission @400000004e70210032536664 simscan:[10605]:CLEAN (-0.90/100.00):5.4039s:test me: (HowTos)