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Received: from Debian-exim by smtpcorp.com with local (Exim 4.94.2-S2G) id 1mIC2T-KXvot4-EA for asterisk@smtpcorp.com ; Mon, 23 Aug 2021 15:39:05 +0000 X-Failed-Recipients: asterisk@smtpcorp.com Auto-Submitted: auto-replied From: Mail Delivery System To: asterisk@smtpcorp.com References: Content-Type: multipart/report; report-type=delivery-status; boundary=1629733145-eximdsn-761718663 MIME-Version: 1.0 Subject: Mail delivery failed : returning message to sender X-Smtp2go-Dsn: v=1 i=1mIC2R-rlZBVH-VE d=corp4 sf=0 m=770027 a="52.7.197.106/32" ab=ipaddr tn=4201 dsn=bounce xh=212 xf=43_228_185_77 tu=1 X-Auto-Response-Suppress: All Precedence: NDR Message-Id: Date: Mon, 23 Aug 2021 15:39:05 +0000 Ubuntu 16.04.7 LTS (GNU/Linux 4.4.0-1128-aws x86_64) running asterisk. something about how I setup the mail sender.