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:

  csa_marketing@lists.uls.co.za
    host garmr.iewc.co.za [154.73.34.79]
    SMTP error from remote mail server after RCPT TO:<csa_marketing@lists.uls.co.za>:
    550 Unrouteable address
  csapr@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<csapr@iafrica.com>:
    550 rejected because recipient verify failed -- user not found
  csands@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<csands@iafrica.com>:
    550 rejected because recipient verify failed -- user not found
  csandell@herschel.wcape.school.za
    host mopani.school.za [197.157.95.68]
    SMTP error from remote mail server after RCPT TO:<csandell@herschel.wcape.school.za>:
    554 5.1.1 <csandell@herschel.wcape.school.za>:
    Recipient address rejected: User unknown in virtual mailbox table
  csamuels@cs.uct.ac.za
    host hotstuff-4.cs.uct.ac.za [137.158.160.142]
    SMTP error from remote mail server after RCPT TO:<csamuels@cs.uct.ac.za>:
    550 Unrouteable address
  csan24@student.monash.edu
    host ASPMX.L.GOOGLE.COM [142.251.12.26]
    SMTP error from remote mail server after RCPT TO:<csan24@student.monash.edu>:
    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 b24si5874864pgb.540 - gsmtp
  CSamaai@vanschaik.com
    host vanschaik-com.mail.protection.outlook.com [104.47.8.36]
    SMTP error from remote mail server after RCPT TO:<CSamaai@vanschaik.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR03FT040.eop-EUR03.prod.protection.outlook.com]
  csaca.raduly@sophos.com
    host mx6.sophos.com [195.171.192.120]
    SMTP error from remote mail server after RCPT TO:<csaca.raduly@sophos.com>:
    550 5.1.1 <csaca.raduly@sophos.com>: Recipient address rejected:
    User unknown in relay recipient table
  cs2000@global.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cs2000@global.co.za>:
    550 rejected because recipient verify failed -- user not found
  cs@tndexpress.com
    host ns115.serve.my [175.138.31.162]
    SMTP error from remote mail server after RCPT TO:<cs@tndexpress.com>:
    550 5.7.1 Service unavailable; client [13.251.162.251] blocked using bl.score.senderscore.com
  cs@pelindobooks.com
    host antispam-01.small-dns.com [149.13.75.27]
    SMTP error from remote mail server after end of data:
    550 High probability of spam
  cs1@averroespharma.com.my
    host mail.averroespharma.com.my [183.81.164.230]
    SMTP error from remote mail server after RCPT TO:<cs1@averroespharma.com.my>:
    550 No such recipient here
  cs@usm.my
    host hytham.usm.my [202.170.57.213]
    SMTP error from remote mail server after end of data:
    554 rejected due to spam content
  cs@tron.com.my
    host alt1.aspmx.l.google.com [173.194.202.26]
    SMTP error from remote mail server after RCPT TO:<cs@tron.com.my>:
    550-5.2.1 The email account that you tried to reach is disabled. Learn more at
    550 5.2.1  https://support.google.com/mail/?p=DisabledUser d186si19004228pga.586 - gsmtp
  cs@myparcelstore.com
    host my2-162.my-serve.com [175.138.31.162]
    SMTP error from remote mail server after RCPT TO:<cs@myparcelstore.com>:
    550 5.7.1 Service unavailable; client [13.251.162.251] blocked using bl.score.senderscore.com
  cs@hetzner.co.za
    host inbound.cpt.host-h.net [197.189.248.34]
    SMTP error from remote mail server after RCPT TO:<cs@hetzner.co.za>:
    550 Unroutable address
  cs@lexpro.co.za
    host mx.spamexperts.com [149.13.75.27]
    SMTP error from remote mail server after end of data:
    550 Message rejected due to user rules.
  cs@floristika.com.my
    host mail.floristika.com.my [13.251.210.182]
    SMTP error from remote mail server after end of data:
    554 5.7.1 Message cannot be accepted, spam rejection
  cs@redpoint.com.my
    host aspmx.l.google.com [142.251.12.26]
    SMTP error from remote mail server after RCPT TO:<cs@redpoint.com.my>:
    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 s14si17267493pgc.770 - gsmtp
  cs@nur.com.my
    host webserver.nur.com.my [58.26.252.34]
    SMTP error from remote mail server after end of data:
    554 rejected due to spam content
  cs@i-city.my
    host alt2.aspmx.l.google.com [142.250.115.27]
    SMTP error from remote mail server after RCPT TO:<cs@i-city.my>:
    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 s7si15155699ois.223 - gsmtp
  cs@education.uct.ac.za
    all hosts for 'education.uct.ac.za' have been failing for a long time (and retry time not reached)
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