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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:

  aquaflor@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<aquaflor@mweb.co.za>:
    550 rejected because recipient verify failed -- user not found
  aquadog@fbsd.za.net
    host ASPMX.L.GOOGLE.COM [142.251.12.27]
    SMTP error from remote mail server after RCPT TO:<aquadog@fbsd.za.net>:
    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 pf14si14221020pjb.185 - gsmtp