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: don.motanna@transnet.net 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 [cq8wivBHMgSKMwnywgQTlQ.za53] don@dgconsult.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 [CkHe8FBwNp-KBdSmb019Dg.za17] don-gill@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 don@cityrock.co.za host mail.cityrock.co.za [197.221.2.33] SMTP error from remote mail server after RCPT TO:: 550 Unroutable address Don.Duplessis@rmb.co.za host mx2.hc858-6.c3s2.iphmx.com [216.71.159.36] 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. Don.leffler@bidfreight.co.za host bidfreight-co-za.mail.protection.outlook.com [104.47.8.36] SMTP error from remote mail server after RCPT TO:: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [AM5EUR03FT030.eop-EUR03.prod.protection.outlook.com] don.n@juno.com all hosts for 'juno.com' have been failing for a long time (and retry time not reached) domus@cis.com host cis-com.relay1g.spamh.com [63.71.12.99] SMTP error from remote mail server after end of data: 554 5.7.1 Phrase Filter #1987057 don@emslieatt.co.za host pop3.pcsquare.co.za [197.221.41.213] SMTP error from remote mail server after pipelined MAIL FROM: SIZE=3542: 554 5.7.1 REJECT BARRACUDACENTRAL 52.221.55.32 is listed in b.barracudacentral.org as a source of spam - see http://www.barracudacentral.org/lookups for details