The original message was received at Mon, 28 Sep 2009 07:10:21 -0500 from [208.33.154.120] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.7.0 Blocked - see https://support.proofpoint.com/dnsbl-lookup.cgi?ip=69.36.41.77: bobbyski@mac.com) ----- Transcript of session follows ----- ... while talking to smtp-mx5.mac.com.: >>> DATA <<< 550 5.7.0 Blocked - see https://support.proofpoint.com/dnsbl-lookup.cgi?ip=69.36.41.77: bobbyski@mac.com 550 5.1.1 ... User unknown <<< 554 5.5.0 No recipients have been specified.