The original message was received at Tue, 20 Dec 2011 18:17:04 +0100 from 173-203-205-227.static.cloud-ips.com [173.203.205.227] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.2.0 No such mailbox) (reason: 550 no mailbox by that name is currently available) ----- Transcript of session follows ----- ... while talking to mailin.rzone.de.: >>> DATA <<< 550 5.2.0 No such mailbox 550 5.1.1 ... User unknown <<< 554 5.0.0 no valid recipients given ... while talking to mx.filtercluster.com.: >>> RCPT To: <<< 550 no mailbox by that name is currently available 550 5.1.1 ... User unknown >>> DATA <<< 503-All RCPT commands were rejected with this error: <<< 503-no mailbox by that name is currently available <<< 503 valid RCPT command must precede DATA