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A message that you sent could not be delivered to one or more of its
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  Daniel.Peytchey@eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<Daniel.Peytchey@eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  Daniel.Ncapai@eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<Daniel.Ncapai@eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  danielag@lowndes.co.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.197.201]
    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 [X2BJ03nNPqOtjGuUT12ECQ.za30]
  daniela.zanner@t-online.de
    host mx02.t-online.de [194.25.134.9]
    SMTP error from remote mail server after RCPT TO:<daniela.zanner@t-online.de>:
    550-5.1.1 user unknown
    550 5.1.1 Unknown recipient.
  daniel.zacks@mail.mcgill.ca
    host mail-mcgill-ca.mail.protection.outlook.com [104.47.61.36]
    SMTP error from remote mail server after RCPT TO:<daniel.zacks@mail.mcgill.ca>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [TO1CAN01FT013.eop-CAN01.prod.protection.outlook.com]
  daniela.dasilva@agrana.com
    host agrana-com.mail.protection.outlook.com [104.47.6.36]
    SMTP error from remote mail server after RCPT TO:<daniela.dasilva@agrana.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [VE1EUR02FT010.eop-EUR02.prod.protection.outlook.com]
  danielb@inala.co.za
    all hosts for 'inala.co.za' have been failing for a long time (and retry time not reached)
  daniel.wong@kgwlogistics.com
    host kgwlogistics-com.mail.protection.outlook.com [104.47.26.10]
    SMTP error from remote mail server after RCPT TO:<daniel.wong@kgwlogistics.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [PSAAPC01FT048.eop-APC01.prod.protection.outlook.com]
  daniel.modiba@siemens.com
    host siemens-com.mail.protection.outlook.com [104.47.0.36]
    SMTP error from remote mail server after RCPT TO:<daniel.modiba@siemens.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [HE1EUR01FT028.eop-EUR01.prod.protection.outlook.com]
  Daniel@Redpoint.co.za
    host mail.redpoint.co.za [41.203.18.22]
    SMTP error from remote mail server after RCPT TO:<Daniel@Redpoint.co.za>:
    550 Unroutable address
  daniel.kruger@compaq.com
    host mx0a-002e3701.pphosted.com [148.163.147.86]
    SMTP error from remote mail server after pipelined DATA:
    550 5.1.1 User Unknown
  daniel.manaka@sandvik.com
    host sandvik-com.mail.protection.outlook.com [104.47.0.36]
    SMTP error from remote mail server after RCPT TO:<daniel.manaka@sandvik.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [HE1EUR01FT027.eop-EUR01.prod.protection.outlook.com]
  daniel@specval.co.za
    host specval-co-za.mail.protection.outlook.com [104.47.19.110]
    SMTP error from remote mail server after RCPT TO:<daniel@specval.co.za>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [JN2ZAF01FT007.eop-zaf01.prod.protection.outlook.com]
  daniel.geswindt@gm.com
    host mx2.imr.gm.com [198.208.57.85]
    SMTP error from remote mail server after RCPT TO:<daniel.geswindt@gm.com>:
    550 #5.1.0 Address rejected.