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:

  Doug.Droskie@Eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<Doug.Droskie@Eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  Doug.Drodskie@Eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<Doug.Drodskie@Eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  doug.oliver@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<doug.oliver@mweb.co.za>:
    550-rejected because 13.251.197.89 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=13.251.197.89
  doug@cbspe.co.za
    host mx1.cpmx.co.za [169.239.218.4]
    SMTP error from remote mail server after end of data:
    550 High probability of spam
  doug@globrand.co.za
    host globrand-co-za.mail.protection.outlook.com [104.47.19.238]
    SMTP error from remote mail server after RCPT TO:<doug@globrand.co.za>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [CT2ZAF01FT007.eop-zaf01.prod.protection.outlook.com]
  doug.h@vodamail.co.za
    host mx1.vodamail.co.za [196.11.146.148]
    SMTP error from remote mail server after RCPT TO:<doug.h@vodamail.co.za>:
    550 5.1.1 <doug.h@vodamail.co.za>: Recipient address rejected:
    User unknown in local recipient table
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:26:00 +0800
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