dear Mr. Syafril & Team,

         rekanan kami mengalami kendala dalam pengiriman email. mohon 
ditambahkan PTR recordnya. berikut log yang saya ambil dari Mail Server.

Wed 2015-11-18 10:17:14.731: ----------
Wed 2015-11-18 10:17:27.340: Session 009693; child 0001
Wed 2015-11-18 10:17:27.340: Accepting SMTP connection from 14.102.148.57:32875 
to 10.0.1.60:25
Wed 2015-11-18 10:17:27.340: --> 220 mail.bintangsaudara.com ESMTP MDaemon 
15.0.3; Wed, 18 Nov 2015 10:17:27 +0700
Wed 2015-11-18 10:17:27.379: <-- EHLO ns72.small-dns.com
Wed 2015-11-18 10:17:27.381: --> 250-mail.bintangsaudara.com Hello 
ns72.small-dns.com, pleased to meet you
Wed 2015-11-18 10:17:27.381: --> 250-ETRN
Wed 2015-11-18 10:17:27.381: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Wed 2015-11-18 10:17:27.381: --> 250-8BITMIME
Wed 2015-11-18 10:17:27.381: --> 250-ENHANCEDSTATUSCODES
Wed 2015-11-18 10:17:27.381: --> 250-STARTTLS
Wed 2015-11-18 10:17:27.381: --> 250 SIZE
Wed 2015-11-18 10:17:27.407: <-- MAIL FROM:<[email protected]> 
SIZE=1614152
Wed 2015-11-18 10:17:27.411: Performing PTR lookup (57.148.102.14.IN-ADDR.ARPA)
Wed 2015-11-18 10:17:27.502: *  D=57.148.102.14.IN-ADDR.ARPA TTL=(15) 
PTR=[ns72f.ipserverone.com]
Wed 2015-11-18 10:17:27.550: *  No A/AAAA records found
Wed 2015-11-18 10:17:27.551: *  MDaemon configured to drop connection on PTR 
record mismatch
Wed 2015-11-18 10:17:27.551: ---- End PTR results
Wed 2015-11-18 10:17:27.551: --> 501 5.7.0 Domain must resolve
Wed 2015-11-18 10:17:27.551: SMTP session terminated (Bytes in/out: 81/293)
Wed 2015-11-18 10:17:27.551: ----------

Sekian dan Terima Kasih.

Regards,

Sucipto
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