This message was created automatically by mail delivery software. 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: kathyd@zinchem.co.za host zinchem-co-za.mail.protection.outlook.com [104.47.56.110] SMTP error from remote mail server after RCPT TO:: 550 5.7.51 TenantInboundAttribution; There is a partner connector configured that matched the message's recipient domain. The connector had either the RestrictDomainsToIPAddresses or RestrictDomainsToCertificate set [DM3NAM02FT034.eop-nam02.prod.protection.outlook.com] kathyhill@xis.co.za host winmail01.xtranetsa.co.za [154.70.137.26] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 Recipient unknown kathyg@tshwane.gov.za host securemail-mx1.synaq.com [196.35.198.158] SMTP error from remote mail server after RCPT TO:: 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 kathyj@redpepper.co.za host alt2.aspmx.l.google.com [142.250.141.27] SMTP error from remote mail server after RCPT TO:: 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 n10si17494171pgr.845 - gsmtp kathyc@ccppcrafts.com host aspmx.l.google.com [142.251.10.27] SMTP error from remote mail server after RCPT TO:: 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 l11si18191560plb.230 - gsmtp kathybrady@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 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 kathy_moodley@schneider.co.za host cluster3.eu.messagelabs.com [85.158.142.192] SMTP error from remote mail server after end of data: 553-Message filtered. Refer to the Troubleshooting page at 553-https://knowledge.broadcom.com/external/article?legacyId 553 =TECH246726 for more information. (#5.7.1) kathy_sharpf@juno.com all hosts for 'juno.com' have been failing for a long time (and retry time not reached)