Mail delivery failed: returning message to sender

[Singnet Mail Delivery System]

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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:

  amandelhof@hartman.co.za
    host mail.hartman.co.za [41.203.18.10]
    SMTP error from remote mail server after RCPT TO:<amandelhof@hartman.co.za>:
    550 Unroutable address
  amandaw@ct.stormnet.co.za
    host cpt.datapro.co.za [41.193.119.123]
    SMTP error from remote mail server after initial connection:
    550 5.5.0 Not allowed.
  amandip@nfp.nedbank.co.za
    host mxgw08.nedbank.co.za [168.142.192.79]
    SMTP error from remote mail server after DATA:
    550 #5.7.1 Your access to submit messages to this e-mail system has been rejected.
  amandaw@sfsonline.co.za
    host mail.sfsonline.co.za [197.221.10.90]
    SMTP error from remote mail server after RCPT TO:<amandaw@sfsonline.co.za>:
    550 Unroutable address
  amandav@transnet.co.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<amandav@transnet.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 [iYHzYMICM2etR5YKkdPTBg.za42]
  amandavw@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<amandavw@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
  AmandavR@autohaus.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<AmandavR@autohaus.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 [EtZCsgAPPrCm2syuvvGzLg.za42]
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 13:47:46 +0800
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