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  CatherineS@tshwane.gov.za
    host securemail-mx1.synaq.com [196.35.198.158]
    SMTP error from remote mail server after RCPT TO:<CatherineS@tshwane.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
  cathfrinf.ducharmf@sophos.com
    host mx6.sophos.com [195.171.192.120]
    SMTP error from remote mail server after RCPT TO:<cathfrinf.ducharmf@sophos.com>:
    550 5.1.1 <cathfrinf.ducharmf@sophos.com>: Recipient address rejected:
    User unknown in relay recipient table
  catherine_ludowell@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<catherine_ludowell@mweb.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
  catherine.koh@fn.com.my
    host fn-com-my.mail.protection.outlook.com [104.47.26.10]
    SMTP error from remote mail server after RCPT TO:<catherine.koh@fn.com.my>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [PSAAPC01FT005.eop-APC01.prod.protection.outlook.com]
  cathc@iafrica.com
    host nav-gateway.mweb.co.za [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<cathc@iafrica.com>:
    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
  catherine@ifas.org.za
    host ifas-org-za.mail.protection.outlook.com [104.47.19.110]
    SMTP error from remote mail server after RCPT TO:<catherine@ifas.org.za>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [JN2ZAF01FT015.eop-zaf01.prod.protection.outlook.com]