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  dogscats@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<dogscats@iafrica.com>:
    550-rejected because 13.251.245.207 is in a black list at combined.abusix.dnsbl
    550 https://lookup.abusix.com/search?q=13.251.245.207
  dohna@fuchs-lubritech.de
    host fuchslubritech-de01c.mail.protection.outlook.com [104.47.4.36]
    SMTP error from remote mail server after RCPT TO:<dohna@fuchs-lubritech.de>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR02FT012.eop-EUR02.prod.protection.outlook.com]