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  chirs@magnetengineering.co.za
    host magnetengineering.co.za [197.242.90.53]
    SMTP error from remote mail server after RCPT TO:<chirs@magnetengineering.co.za>:
    550 No Such User Here
  chitra_d90@hotmail.com
    host hotmail-com.olc.protection.outlook.com [104.47.18.97]
    SMTP error from remote mail server after RCPT TO:<chitra_d90@hotmail.com>:
    550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).
  Chirsksekgobela@gmail.com
    host gmail-smtp-in.l.google.com [142.251.10.27]
    SMTP error from remote mail server after RCPT TO:<Chirsksekgobela@gmail.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 i27si17486296pfq.175 - gsmtp