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:

  fabraha@pawc.wcape.gov.za
    host securemail-mx1.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<fabraha@pawc.wcape.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
  fabkoot@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<fabkoot@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
  faberd@dohcps.kzntl.gov.za
    host securemail-mx2.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<faberd@dohcps.kzntl.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
  fabmach@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<fabmach@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
  fabcon@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<fabcon@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
  fabio.zanardi@ig.com.br
    host mx4.ig.correio.biz [200.234.204.130]
    SMTP error from remote mail server after initial connection:
    554 5.7.1 Service unavailable; Client host [13.251.197.89] blocked using returnpath.dnsbl; Return Path RPBL Listed - noauth
  fabionbaatjies@ub.absa.co.za
    all hosts for 'ub.absa.co.za' have been failing for a long time (and retry time not reached)
  fabio@gam.com.br
    host ASPMX.L.GOOGLE.COM [172.217.194.26]
    SMTP error from remote mail server after RCPT TO:<fabio@gam.com.br>:
    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 w7si8270901pgh.813 - gsmtp
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Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:31:44 +0800
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