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:

  debeery.ecr.gt_eskom_centre@eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<debeery.ecr.gt_eskom_centre@eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  debi.zaks@nrc.ca
    host mx.ssan.egs-seg.gc.ca [205.193.229.132]
    SMTP error from remote mail server after RCPT TO:<debi.zaks@nrc.ca>:
    550 5.1.1  User unknown
  debits@sv1.co.za
    host mx.spamexperts.com [130.117.53.188]
    SMTP error from remote mail server after end of data:
    550 High probability of spam