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: charlene@tad.co.za host mx0.clarocloud.co.za [196.13.179.138] SMTP error from remote mail server after end of data: 554 5.7.1 Message rejected because of unacceptable content. For help, please quote incident ID 036o6dqoD. Charlene@blueschool.co.za host blueschool.co.za [156.38.216.170] SMTP error from remote mail server after RCPT TO:: 550 No Such User Here charlene.scheepers@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 Charlene.February@Sanlam.co.za host za-smtp-inbound-2.mimecast.co.za [41.74.197.210] SMTP error from remote mail server after RCPT TO:: 550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [KzRecJqKP2KGJETitGqb3w.za118] charlene@jjrinc.co.za host za-smtp-inbound-2.mimecast.co.za [41.74.193.210] SMTP error from remote mail server after end of data: 554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [Sv4I9fgAOye0RJ1TM4IwOQ.za107] charl.vanniekerk@alphaalfa.co.za host za-smtp-inbound-2.mimecast.co.za [41.74.197.210] SMTP error from remote mail server after end of data: 554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [KzRecJqKP2KGJETitGqb3w.za118] charl.naude@harmony.co.za host za-smtp-inbound-2.mimecast.co.za [41.74.197.210] SMTP error from remote mail server after RCPT TO:: 550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [KzRecJqKP2KGJETitGqb3w.za118] charleen611@live.com host live-com.olc.protection.outlook.com [104.47.18.97] 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. [AM6EUR05FT030.eop-eur05.prod.protection.outlook.com] charld@aviation.denel.co.za all hosts for 'aviation.denel.co.za' have been failing for a long time (and retry time not reached)