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: amelia@istream.co.za host mail.istream.co.za [196.22.142.46] SMTP error from remote mail server after RCPT TO:: 550 Unroutable address Amelia@comchest.org.za host comchest-org-za.mail.protection.outlook.com [104.47.8.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR03FT003.eop-EUR03.prod.protection.outlook.com] amdrosetav@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 ameeng@telkom.net all hosts for 'telkom.net' have been failing for a long time (and retry time not reached)