Mail delivery failed: returning message to sender

[Singnet Mail Delivery System]

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:

  cn_notification@made-in-china.com
    host mail3.made-in-china.com [221.6.35.101]
    SMTP error from remote mail server after end of data:
    554 rejected due to spam content
  cnautica@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cnautica@mweb.co.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
  cnam@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cnam@mweb.co.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
  cn421@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cn421@mweb.co.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
  cmy@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cmy@mweb.co.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
  cnaidoo@sigmaintl.co.za
    host sigmaintl-co-za.mail.protection.outlook.com [104.47.10.36]
    SMTP error from remote mail server after RCPT TO:<cnaidoo@sigmaintl.co.za>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DB5EUR03FT023.eop-EUR03.prod.protection.outlook.com]
  cn-mail@t-online.de
    host mx02.t-online.de [194.25.134.9]
    SMTP error from remote mail server after RCPT TO:<cn-mail@t-online.de>:
    550-5.1.1 user unknown
    550 5.1.1 Unknown recipient.
  cnaidoo2@ceres.co.za
    all hosts for 'ceres.co.za' have been failing for a long time (and retry time not reached)
  cmyburg@postino.up.ac.za
    host aspmx.l.google.com [142.251.10.26]
    SMTP error from remote mail server after RCPT TO:<cmyburg@postino.up.ac.za>:
    550-5.1.1 The email account that you tried to reach does not exist. Please try
    550-5.1.1 double-checking the recipient's email address for typos or
    550-5.1.1 unnecessary spaces. Learn more at
    550 5.1.1  https://support.google.com/mail/?p=NoSuchUser c7si18822971pgw.447 - gsmtp
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Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:09:49 +0800
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