Mail delivery failed: returning message to sender

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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:

  cryanlauch@wail.com
    host wail.com [69.175.95.50]
    SMTP error from remote mail server after RCPT TO:<cryanlauch@wail.com>:
    550 No Such User Here
  cryotech@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cryotech@iafrica.com>:
    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
  cryfrs@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cryfrs@iafrica.com>:
    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
  cryantj@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cryantj@iafrica.com>:
    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
  crvidigal@hotmail.com
    host hotmail-com.olc.protection.outlook.com [104.47.70.33]
    SMTP error from remote mail server after RCPT TO:<crvidigal@hotmail.com>:
    550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).
  crwaro001@mail.uct.ac.za
    all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)
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Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:11:40 +0800
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