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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:

  adderleysprojects@iburst.co.za
    host mailguard13.neotel.co.za [41.168.131.16]
    SMTP error from remote mail server after RCPT TO:<adderleysprojects@iburst.co.za>:
    554 5.7.1 <adderleysprojects@iburst.co.za>: Recipient address rejected:
    Access denied
  add@wol.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<add@wol.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
  adcase@mweb.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<adcase@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
  adc@global.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<adc@global.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
  adarkai@global.co.za
    host securemail-mx3.synaq.com [196.35.198.130]
    SMTP error from remote mail server after RCPT TO:<adarkai@global.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
  adartcard@vip.sina.com
    host mx3.vip.sina.com [49.7.37.128]
    SMTP error from remote mail server after RCPT TO:<adartcard@vip.sina.com>:
    552 5.2.1 Quota exceeded or service disabled.
  adcastro@noln.com
    host smtp.secureserver.net [72.167.238.29]
    SMTP error from remote mail server after RCPT TO:<adcastro@noln.com>:
    550 5.1.1 <adcastro@noln.com> Recipient not found.  <http://x.co/irbounce>
  adb@ananzi.co.za
    host mx.cloudafrica.email [41.79.76.130]
    SMTP error from remote mail server after RCPT TO:<adb@ananzi.co.za>:
    550 5.1.1 <adb@ananzi.co.za>: Recipient address rejected:
    undeliverable address: host 10.0.35.24[10.0.35.24] said:
    550 Rejected - Invalid recipient address (in reply to RCPT TO command)
  Adaniels@pgwc.gov.za
    host pgwc-gov-za.mail.protection.outlook.com [104.47.9.36]
    SMTP error from remote mail server after RCPT TO:<Adaniels@pgwc.gov.za>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [VE1EUR03FT040.eop-EUR03.prod.protection.outlook.com]
  adatchaim18@juno.com
    all hosts for 'juno.com' have been failing for a long time (and retry time not reached)