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  frenzelfrenzel@advisorycouncil.org
    host advisorycouncil.org [181.214.83.177]
    SMTP error from remote mail server after RCPT TO:<frenzelfrenzel@advisorycouncil.org>:
    550 No such person at this address"
  fresh@icon.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<fresh@icon.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
  frenchl@plho.kzntl.gov.za
    host securemail-mx2.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<frenchl@plho.kzntl.gov.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
  frema@isat.co.za
    host ms1.isat.co.za [13.90.96.118]
    SMTP error from remote mail server after RCPT TO:<frema@isat.co.za>:
    550 Requested action not taken: mailbox unavailable or not local.