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: kdreyer@alpha.co.za host alpha.co.za [67.227.188.171] SMTP error from remote mail server after RCPT TO:: 550 No Such User Here KDortzbach@mac.com host mx01.mail.icloud.com [17.56.9.17] SMTP error from remote mail server after pipelined end of data: 554 5.7.1 [CS01] Message rejected due to local policy. Please visit https://support.apple.com/en-us/HT204137 kdprod@educ.disi.unige.it host vm-mailfw2.csita.unige.it [130.251.200.8] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: undeliverable address: host smtp.unige.it[130.251.222.102] said: 550 5.1.1 : Recipient address rejected: User unknown (in reply to RCPT TO command) kdroste@worldonline.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 kdraper@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 kdp@global.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 kdlrey@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 kdl@worldonline.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 kdoman@iafrica.com host nav-gateway.mweb.co.za [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found kdlamini@fnb.co.za host mx2.hc858-6.c3s2.iphmx.com [216.71.157.235] SMTP error from remote mail server after RCPT TO:: 550 #5.1.0 Address rejected. kdlomo@csir.co.za host pta-smg3.csir.co.za [146.64.81.182] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: undeliverable address: host csir-co-za.mail.protection.outlook.com[104.47.5.36] said: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [HE1EUR02FT057.eop-EUR02.prod.protection.outlook.com] (in reply to RCPT TO command) kdnme1@student.monash.edu host ASPMX.L.GOOGLE.COM [172.217.194.27] SMTP error from remote mail server after RCPT TO:: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser e6si19849860pgn.112 - gsmtp kdnche001@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)