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:

  jlittlf@adn.com
    host ASPMX.L.GOOGLE.com [74.125.24.27]
    SMTP error from remote mail server after RCPT TO:<jlittlf@adn.com>:
    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 h12si16280813pfc.282 - gsmtp
  jlldum001@mail.uct.ac.za
    all hosts for 'mail.uct.ac.za' have been failing for a long time (and retry time not reached)
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Date: Mon, 29 Nov 2021 15:00:14 +0800
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