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:

  Felicia.Kakora@eskom.co.za
    host mx1.eskom.seagatestoragecloud.co.za [169.239.240.92]
    SMTP error from remote mail server after RCPT TO:<Felicia.Kakora@eskom.co.za>:
    550-Callout verification failed:
    550 550 5.1.1 User unknown
  Felicia.Mjila@res.co.za
    host alt2.aspmx.l.google.com [142.250.115.27]
    SMTP error from remote mail server after RCPT TO:<Felicia.Mjila@res.co.za>:
    550-5.1.1 The email account that you tried to reach does not exist. Please try
    550-5.1.1 double-checking the recipient's email address for typos or
    550-5.1.1 unnecessary spaces. Learn more at
    550 5.1.1  https://support.google.com/mail/?p=NoSuchUser r22si12741917otq.100 - gsmtp
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From: "BEN JOHNSON" <mauve-patches@sourceware.org>
Subject: WARM REGARDS
Date: Mon, 29 Nov 2021 14:32:17 +0800
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