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: krishnan.mkbn@galileosa.co.za host mail-gw2.pccc.co.za [3.64.82.161] SMTP error from remote mail server after RCPT TO:: 550 5.1.1 : Recipient address rejected: undeliverable address: host 196.22.216.144[196.22.216.144] said: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command) krishp@joburg.org.za host za-smtp-inbound-1.mimecast.co.za [41.74.193.201] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [bK1iNHjvOLCLsitOXUu2tw.za75] krishp@bell.co.za host za-smtp-inbound-1.mimecast.co.za [41.74.193.201] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [bK1iNHjvOLCLsitOXUu2tw.za75] krishne.padayachee@frame.co.za host za-smtp-inbound-1.mimecast.co.za [41.74.193.201] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [bK1iNHjvOLCLsitOXUu2tw.za75] krishnavellier@medscheme.co.za host za-smtp-inbound-1.mimecast.co.za [41.74.193.201] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [bK1iNHjvOLCLsitOXUu2tw.za75] krishniem@kznedu.kzntl.gov.za host securemail-mx2.synaq.com [196.35.198.158] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 krishnar@premier.kzntl.gov.za host securemail-mx2.synaq.com [196.35.198.158] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 krishp@rheem.co.za host za-smtp-inbound-2.mimecast.co.za [41.74.193.210] SMTP error from remote mail server after RCPT TO:: 550 sip.invaluement.mimecast.org Blocked by ivmSIP and/or ivmSIP/24 - see https://www.invaluement.com/lookup/?item=52.221.55.32. - https://community.mimecast.com/docs/DOC-1369#550 [0ifWDA6CO8aWjYBxPvJKHQ.za93] krishnee@boe.co.za host mxgw04.nedbank.co.za [168.142.192.38] SMTP error from remote mail server after DATA: 550 #5.7.1 Your access to submit messages to this e-mail system has been rejected. krishnip@mweb.co.za host securemail-mx3.synaq.com [196.35.198.130] SMTP error from remote mail server after RCPT TO:: 550-rejected because 52.221.55.32 is in a black list at combined.abusix.dnsbl 550 https://lookup.abusix.com/search?q=52.221.55.32 krisrewards@hotelistana.com.my host cluster6.us.messagelabs.com [67.219.250.205] SMTP error from remote mail server after RCPT TO:: 550-Invalid recipient 550 (#5.1.1) krisna@jcat.co.za host 1-grid-mx02.com [41.185.249.60] SMTP error from remote mail server after RCPT TO:: 554 5.7.1 Service unavailable; Client host [52.221.55.32] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=52.221.55.32