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:

  daf@cy.co.za
    host cy.co.za [209.124.66.8]
    SMTP error from remote mail server after RCPT TO:<daf@cy.co.za>:
    550 No Such User Here"
  dag@maties.sun.ac.za
    host mail2.sun.ac.za [146.232.64.14]
    SMTP error from remote mail server after RCPT TO:<dag@maties.sun.ac.za>:
    550
  dafiesher@iqgroup.net
    host za-smtp-inbound-1.mimecast.co.za [41.74.197.201]
    SMTP error from remote mail server after RCPT TO:<dafiesher@iqgroup.net>:
    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 [i1k6rKlxMGGbE4Jl9j8Bjw.za142]
  dadwals@vsnl.com
    all hosts for 'vsnl.com' 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 14:12:33 +0800
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