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:

  janx@xsinet.co.za
    host ironport.xsinet.co.za [41.193.119.123]
    SMTP error from remote mail server after RCPT TO:<janx@xsinet.co.za>:
    550 5.1.1 <janx@xsinet.co.za>... User unknown
  januarie@kingsley.co.za
    host mail.kingsley.co.za [23.111.151.150]
    SMTP error from remote mail server after RCPT TO:<januarie@kingsley.co.za>:
    550-No such person at this address. If you feel you have reached this message
    550 in error\, please call +27823096710"
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:56:02 +0800
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