The original message was received at Thu, 13 Feb 2014 10:11:49 +1300 from mx4.orcon.net.nz [219.88.242.54] ----- The following addresses had permanent fatal errors ----- <deleted@deleted> (reason: 550 5.7.1 Recipient not authorized, your IP has been found on a block list) ----- Transcript of session follows ----- ... while talking to mail.tbhub.co.nz.: >>> DATA <<< 550 5.7.1 Recipient not authorized, your IP has been found on a block list 550 5.1.1 <deleted@deleted>... User unknown <<< 503 5.5.2 Need rcpt command
Edit:
and its happened again, this time sending to xnet
----- The following addresses had permanent fatal errors ----- <deleted@xnet.co.nz> (reason: 554 5.7.1 Service unavailable; Client host [60.234.4.76] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?60.234.4.76)