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: c.m.mckinlay@hull.ac.uk host d209038.a.ess.uk.barracudanetworks.com [18.133.136.188] SMTP error from remote mail server after end of data: 550 permanent failure for one or more recipients (c.m.mckinlay@hull.ac.uk:blocked) c.e.caddick@btinternet.com host mx.lb.btinternet.com [213.120.69.92] SMTP error from remote mail server after RCPT TO:: 550 RCPT TO: User unknown c.cruni@uol.com host mx-p1.uol.com.br [200.147.35.219] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: User unknown in virtual alias table C.Gray@ru.ac.za host mx.ru.ac.za [146.231.128.53] SMTP error from remote mail server after RCPT TO:: 550 Invalid Rhodes University e-mail address: c.gray@ru.ac.za c.finserve@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found c.debeer@netactive.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found c.coulon@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found c.hutchinson@conservation.org host conservation-org.mail.protection.outlook.com [104.47.73.138] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [MW2NAM04FT043.eop-NAM04.prod.protection.outlook.com] C.LIEVENS@dirafrost.be host dirafrost-be.mail.protection.outlook.com [104.47.4.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR02FT013.eop-EUR02.prod.protection.outlook.com] C.GELADE@dirafrost.be host dirafrost-be.mail.protection.outlook.com [104.47.4.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR02FT013.eop-EUR02.prod.protection.outlook.com] c.fuller@vodamail.co.za host mx1.vodamail.co.za [196.11.146.148] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: User unknown in local recipient table c.dobson@ntlworld.com host mx.tb.ukmail.iss.as9143.net [212.54.56.11] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 MXIN501 mailbox c.dobson@ntlworld.com unknown ;id=rZmmmV7KmeCFBrZmnmXdTw;sid=rZmmmV7KmeCFB;mta=mx11.tb;d=20211129;t=070509[CET];ipsrc=13.251.146.0; c.hobson@kc.ecape.school.za all hosts for 'kc.ecape.school.za' have been failing for a long time (and retry time not reached) c.cunliffe@wellcome.ac.uk host wellcome-ac-uk.mail.protection.outlook.com [104.47.0.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [HE1EUR01FT039.eop-EUR01.prod.protection.outlook.com]