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:

  jcl@polka.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<jcl@polka.co.za>:
    550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=52.221.55.32
  jcipser@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<jcipser@mweb.co.za>:
    550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=52.221.55.32
  jchsal@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<jchsal@mweb.co.za>:
    550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=52.221.55.32
  jchevalier@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<jchevalier@mweb.co.za>:
    550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=52.221.55.32
  jchffk@msn.com
    host msn-com.olc.protection.outlook.com [104.47.51.33]
    SMTP error from remote mail server after RCPT TO:<jchffk@msn.com>:
    550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).
  jclaasen@clover.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.201]
    SMTP error from remote mail server after RCPT TO:<jclaasen@clover.co.za>:
    550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [vvNSNduGPwOP8uyvs_iWUg.za53]
  JChikaonda@kth.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.201]
    SMTP error from remote mail server after RCPT TO:<JChikaonda@kth.co.za>:
    550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [vvNSNduGPwOP8uyvs_iWUg.za53]
  jchris@gp.waltons.co.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<jchris@gp.waltons.co.za>:
    550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [IxfBAQszPz-jhi1dib8YJw.za38]
  jcl@jclcargo.co.za
    host mx1.cpmx.co.za [169.239.217.4]
    SMTP error from remote mail server after RCPT TO:<jcl@jclcargo.co.za>:
    550 No Such User Here
  Jcinthebk@gmail.com
    host gmail-smtp-in.l.google.com [172.217.194.27]
    SMTP error from remote mail server after RCPT TO:<Jcinthebk@gmail.com>:
    552-5.2.2 The email account that you tried to reach is over quota and inactive.
    552-5.2.2 Please direct the recipient to
    552 5.2.2  https://support.google.com/mail/?p=OverQuotaPerm c19si8041771pgw.738 - gsmtp
  JClark@worldnetlogistics.com
    host worldnetlogistics-com.mail.protection.outlook.com [104.47.26.10]
    SMTP error from remote mail server after RCPT TO:<JClark@worldnetlogistics.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [PSAAPC01FT018.eop-APC01.prod.protection.outlook.com]
  jckcat003@mail.uct.ac.za
    all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)
  jcl@web.co.za
    all hosts for 'web.co.za' have been failing for a long time (and retry time not reached)
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