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: azizo@rockart.wits.ac.za retry timeout exceeded azoic@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 azmexo1@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 azj@polka.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 azo1@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 azizl@sirim.my host sirim-my.mail.protection.outlook.com [104.47.26.10] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [PSAAPC01FT022.eop-APC01.prod.protection.outlook.com] azman@blackwolfdigital.com all hosts for 'blackwolfdigital.com' have been failing for a long time (and retry time not reached)