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: barnartg@sci.uovs.ac.za retry timeout exceeded bargenhw@sci.uovs.ac.za retry timeout exceeded barnardth@csdtargus.co.za host mail.csdtargus.co.za [197.221.12.147] SMTP error from remote mail server after RCPT TO:: 550 Unroutable address barnard@egs.uct.ac.za host smtp1.csag.uct.ac.za [137.158.102.30] SMTP error from remote mail server after RCPT TO:: 550 relay not permitted barney@powerzone.co.za host powerzone-co-za.mail.protection.outlook.com [104.47.9.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. 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