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
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  zingonil@cput.ac.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  vsewper@makro.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  swanepk@medicross.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after RCPT TO:<swanepk@medicross.co.za>:
    550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  suea@gpg.gov.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  werner.debeer@ppc.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  tyrone@eurosteel.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after RCPT TO:<tyrone@eurosteel.co.za>:
    550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  w.hammer@spoor.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after RCPT TO:<w.hammer@spoor.co.za>:
    550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [Ymb8AIREPqSwRoa0XgZc4A.za117]
  warrenb@bell.co.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.193.201]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [2YoDUn7HOP6-QtGX9A9atA.za87]
  vincents@npa.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.197.210]
    SMTP error from remote mail server after end of data:
    554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [E-EOLVLbP6etSRc0CWQxcg.za62]
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 13:01:10 +0800
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