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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:

  danieltomlinson@btinternet.com
    host mx.lb.btinternet.com [213.120.69.2]
    SMTP error from remote mail server after RCPT TO:<danieltomlinson@btinternet.com>:
    550 RCPT TO:<danieltomlinson@btinternet.com> User unknown
  danielmap@statssa.gov.za
    host securemail-mx1.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<danielmap@statssa.gov.za>:
    550-rejected because 13.251.197.89 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=13.251.197.89
  DANIELMAKO@TSHWANE.GOV.ZA
    host securemail-mx1.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<DANIELMAKO@TSHWANE.GOV.ZA>:
    550-rejected because 13.251.197.89 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=13.251.197.89
  danielm@crownnational.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<danielm@crownnational.co.za>:
    550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [GXnKv21zPn-zyBdPCLDf3w.za80]
  danielsokana@labour.gov.za
    host securemail-mx2.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<danielsokana@labour.gov.za>:
    550-rejected because 13.251.197.89 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=13.251.197.89
  danielmqadi@ovi.com
    all hosts for 'ovi.com' have been failing for a long time (and retry time not reached)