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Pak Syafril, barusan saya menambahkan # hostname can not be Resolve 103.131.51.9 # wellmail.extremhost.net Di ReverseXpt.dat Berikut log SMPT – (IN) : Tue 2019-10-08 17:16:11.231: ---------- Tue 2019-10-08 17:16:22.497: [923127] Session 923127; child 0001 Tue 2019-10-08 17:16:22.497: [923127] Accepting SMTP connection from 103.131.51.9:57939 to 172.16.0.6:25 Tue 2019-10-08 17:16:22.497: [923127] --> 220 bb.ptbmi.com ESMTP MDaemon 19.0.2; Tue, 08 Oct 2019 17:16:22 +0700 Tue 2019-10-08 17:16:22.518: [923127] <-- EHLO wellmail.extremhost.net Tue 2019-10-08 17:16:22.518: [923127] --> 250-bb.ptbmi.com Hello wellmail.extremhost.net [103.131.51.9], pleased to meet you Tue 2019-10-08 17:16:22.518: [923127] --> 250-ETRN Tue 2019-10-08 17:16:22.518: [923127] --> 250-AUTH LOGIN PLAIN Tue 2019-10-08 17:16:22.518: [923127] --> 250-8BITMIME Tue 2019-10-08 17:16:22.518: [923127] --> 250-ENHANCEDSTATUSCODES Tue 2019-10-08 17:16:22.518: [923127] --> 250-STARTTLS Tue 2019-10-08 17:16:22.518: [923127] --> 250 SIZE 36700160 Tue 2019-10-08 17:16:22.542: [923127] <-- STARTTLS Tue 2019-10-08 17:16:22.542: [923127] --> 220 2.7.0 Ready to start TLS Tue 2019-10-08 17:16:22.642: [923127] SSL negotiation successful (TLS 1.2, 521 bit key exchange, 256 bit AES encryption) Tue 2019-10-08 17:16:22.665: [923127] <-- EHLO wellmail.extremhost.net Tue 2019-10-08 17:16:22.665: [923127] --> 250-bb.ptbmi.com Hello wellmail.extremhost.net [103.131.51.9], pleased to meet you Tue 2019-10-08 17:16:22.665: [923127] --> 250-ETRN Tue 2019-10-08 17:16:22.665: [923127] --> 250-AUTH LOGIN PLAIN Tue 2019-10-08 17:16:22.665: [923127] --> 250-8BITMIME Tue 2019-10-08 17:16:22.665: [923127] --> 250-ENHANCEDSTATUSCODES Tue 2019-10-08 17:16:22.665: [923127] --> 250 SIZE 36700160 Tue 2019-10-08 17:16:22.688: [923127] <-- MAIL FROM:<reservat...@theshalimarhotel.co.id> SIZE=176593 Tue 2019-10-08 17:16:22.691: [923127] Performing PTR lookup (9.51.131.103.IN-ADDR.ARPA) Tue 2019-10-08 17:16:22.807: [923127] * D=9.51.131.103.in-addr.arpa TTL=(240) PTR=[well.ardetamedia.net] Tue 2019-10-08 17:16:22.859: [923127] * D=well.ardetamedia.net TTL=(5) A=[103.131.51.9] Tue 2019-10-08 17:16:22.859: [923127] ---- End PTR results Tue 2019-10-08 17:16:22.860: [923127] Performing IP lookup (wellmail.extremhost.net) Tue 2019-10-08 17:16:23.441: [923127] * DNS server reports domain name unknown Tue 2019-10-08 17:16:23.441: [923127] ---- End IP lookup results Tue 2019-10-08 17:16:23.441: [923127] --> 501 5.7.0 wellmail.extremhost.net host can't be resolved Tue 2019-10-08 17:16:23.442: [923127] SMTP session terminated (Bytes in/out: 818/3902) Tue 2019-10-08 17:16:23.442: ---------- Terimakasih Rievo --- This email has been checked for viruses by AVG. https://www.avg.com -- --[mdaemon-l]---------------------------------------------------------- Milis ini untuk Diskusi antar pengguna MDaemon Mail Server di Indonesia Netiket: https://wiki.openstack.org/wiki/MailingListEtiquette Arsip: http://mdaemon-l.dutaint.com Dokumentasi : http://mdaemon.dutaint.co.id Berlangganan: Kirim mail ke mdaemon-l-subscr...@dutaint.com Henti Langgan: Kirim mail ke mdaemon-l-unsubscr...@dutaint.com Versi terakhir MD 19.0.3, SG 6.1.0