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:

  chris@publishingworldsa.com
    host fallbackmx.spamexperts.eu [149.13.75.27]
    SMTP error from remote mail server after end of data:
    550 High probability of spam
  chris@superiorsupport.co.za
    host mx3.mtaroutes.com [130.117.53.188]
    SMTP error from remote mail server after end of data:
    550 High probability of spam
  chris@redlanddesign.com
    host mail.redlanddesign.com [202.75.45.39]
    SMTP error from remote mail server after MAIL FROM:<mauve-patches@sourceware.org> SIZE=3542:
    550 Rejected by Barracuda
  chris@skymap.com
    host skymap-com.mail.protection.outlook.com [104.47.59.138]
    SMTP error from remote mail server after RCPT TO:<chris@skymap.com>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DM6NAM12FT040.eop-nam12.prod.protection.outlook.com]
  chris@sdklab.com
    all hosts for 'sdklab.com' have been failing for a long time (and retry time not reached)
  chris@power.co.za
    host mail.power.co.za [156.38.230.134]
    SMTP error from remote mail server after RCPT TO:<chris@power.co.za>:
    550 Unroutable address
  Chris@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<Chris@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
  chris@grey.fs.school.za
    host mail.gc.co.za [102.132.13.34]
    SMTP error from remote mail server after RCPT TO:<chris@grey.fs.school.za>:
    550 5.7.1 <chris@grey.fs.school.za>... Relaying denied. Proper authentication required.
  chris@dupwest.co.za
    host mail-gateway.imaginet.co.za [41.78.29.100]
    SMTP error from remote mail server after RCPT TO:<chris@dupwest.co.za>:
    550 5.7.1 Service unavailable; client [52.221.55.32] blocked using b.barracudacentral.org
  chris@galvatech.co.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after RCPT TO:<chris@galvatech.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 [zXzYPy5JML2p390mZyP1rg.za111]
  chris@wpbts.org.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.193.201]
    SMTP error from remote mail server after RCPT TO:<chris@wpbts.org.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 [r1kr29MTN2WC_frDi__VSw.za99]
  chris@ewt.org.za
    host za-smtp-inbound-2.mimecast.co.za [41.74.193.201]
    SMTP error from remote mail server after RCPT TO:<chris@ewt.org.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 [r1kr29MTN2WC_frDi__VSw.za99]
  chris@coolawnings.co.za
    host 1-grid-mx04.com [41.61.249.30]
    SMTP error from remote mail server after RCPT TO:<chris@coolawnings.co.za>:
    554 5.7.1 Service unavailable; Client host [52.221.55.32] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=52.221.55.32
  Chris@cip.co.za
    host mx1.mweb.net [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<Chris@cip.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
  chrianto@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<chrianto@iafrica.com>:
    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
  chris@centric.za.net
    host fw1a.centric.za.net [41.185.84.4]
    SMTP error from remote mail server after RCPT TO:<chris@centric.za.net>:
    554 5.7.1 Service unavailable; Client host [52.221.55.32] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=52.221.55.32
  chridtot@vodamail.com
    all hosts for 'vodamail.com' have been failing for a long time (and retry time not reached)
  chris@ilink.nis.za
    Unrouteable address
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:06:43 +0800
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