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:

  dangm@libertyproperties.co.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<dangm@libertyproperties.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 [7aor5-MLPEahaOXV6uL-sg.za40]
  danette.stipcich@dae.kzntl.gov.za
    host securemail-mx2.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<danette.stipcich@dae.kzntl.gov.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
  danemb.cpt@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<danemb.cpt@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
  dangelino@eustace.org
    host aspmx.l.google.com [142.251.10.26]
    SMTP error from remote mail server after RCPT TO:<dangelino@eustace.org>:
    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 x1si5120553pgj.470 - gsmtp
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:12:47 +0800
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