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: crum@iafrica.com host nav-gateway.mweb.co.za [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 crucfz@iafrica.com host nav-gateway.mweb.co.za [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 crsmark@iafrica.com host nav-gateway.mweb.co.za [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 crsmar@iafrica.com host nav-gateway.mweb.co.za [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 crtada01@its.uct.ac.za host za-smtp-inbound-2.mimecast.co.za [41.74.197.201] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [-nspkSi8ND-IC9BcoFEo9Q.za114] crsbelabela@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 crstlmyt@swcp.com host mx1.swcp.com [216.184.2.127] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 ... User unknown cruisfrhfad@msn.com host msn-com.olc.protection.outlook.com [104.47.18.161] SMTP error from remote mail server after RCPT TO:: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). crucf.cartif@za.didata.com host eu-smtp-inbound-2.mimecast.com [195.130.217.241] SMTP error from remote mail server after RCPT TO:: 550 Unknown Recipient - https://community.mimecast.com/docs/DOC-1369#550 [Oy2cnvL5NreZ3BjcKlm8-Q.uk264] crssim03@scilab.uct.ac.za all hosts for 'scilab.uct.ac.za' have been failing for a long time (and retry time not reached) crtrob003@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached) crtant003@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached) crsche001@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)