This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: KEOSENG@MWEB.CO.ZA host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 13.251.245.207 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=13.251.245.207 keolam@nedcor.co.za host mxgw05.nedbank.co.za [168.142.192.39] SMTP error from remote mail server after initial connection: 550 Too many invalid recipients