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: DTS.DTS@galileosa.co.za host mail-gw2.pccc.co.za [3.64.82.161] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: undeliverable address: host 196.22.216.144[196.22.216.144] said: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command) dts@mtnloaded.co.za host securemail-mx1.synaq.com [196.35.198.158] SMTP error from remote mail server after RCPT TO:: 550 rejected because recipient verify failed -- user not found dturner@kv3.co.za host mx1.improvmx.com [51.91.128.110] SMTP error from remote mail server after RCPT TO:: 550 5.1.9 Relay not permitted. (#id-5.9.2) - ImprovMX dtpon1@student.monash.edu host ASPMX.L.GOOGLE.COM [142.251.12.26] 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 u13si11490946pgf.402 - gsmtp dtt8@msn.com host msn-com.olc.protection.outlook.com [104.47.17.161] SMTP error from remote mail server after pipelined end of data: 550 5.7.1 Unfortunately, messages from [13.251.146.0] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [VI1EUR05FT024.eop-eur05.prod.protection.outlook.com] dttjes001@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached) DTSIGN001@mail.uct.ac.za all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)