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:

  crum@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<crum@iafrica.com>:
    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
  crucfz@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<crucfz@iafrica.com>:
    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
  crsmark@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<crsmark@iafrica.com>:
    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
  crsmar@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<crsmar@iafrica.com>:
    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
  crtada01@its.uct.ac.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<crtada01@its.uct.ac.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 [-nspkSi8ND-IC9BcoFEo9Q.za114]
  crsbelabela@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<crsbelabela@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
  crstlmyt@swcp.com
    host mx1.swcp.com [216.184.2.127]
    SMTP error from remote mail server after RCPT TO:<crstlmyt@swcp.com>:
    550 5.1.1 <crstlmyt@swcp.com>... User unknown
  cruisfrhfad@msn.com
    host msn-com.olc.protection.outlook.com [104.47.18.161]
    SMTP error from remote mail server after RCPT TO:<cruisfrhfad@msn.com>:
    550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).
  crucf.cartif@za.didata.com
    host eu-smtp-inbound-2.mimecast.com [195.130.217.241]
    SMTP error from remote mail server after RCPT TO:<crucf.cartif@za.didata.com>:
    550 Unknown Recipient - https://community.mimecast.com/docs/DOC-1369#550 [Oy2cnvL5NreZ3BjcKlm8-Q.uk264]
  crssim03@scilab.uct.ac.za
    all hosts for 'scilab.uct.ac.za' have been failing for a long time (and retry time not reached)
  crtrob003@mail.uct.ac.za
    all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)
  crtant003@mail.uct.ac.za
    all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)
  crsche001@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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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:11:37 +0800
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