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: kitty@vpns.co.za host vpns.co.za [102.222.66.131] SMTP error from remote mail server after RCPT TO:: 550 No Such User Here KITTY@OPTIONads.co.za host mxfilter.mxsecure.co.za [216.55.103.181] SMTP error from remote mail server after RCPT TO:: 554 5.7.1 Service unavailable; Client host [52.221.55.32] blocked using spamip.dnsbl kitty@medholdm.co.za host za-smtp-inbound-2.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 [ru1fS2AhMuaVnjbV5JvZ1A.za59] kitty.vandermerwe@dpw.gov.za host securemail-mx1.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