Dear Om Syafril,

Email server kami MDAEMON 12.5.0 kami mengaktifkan feature reverse lookup,
saat ini kami mempunya masalah pada satu domain yang tidak bisa masuk ke
kami dengan log sebagai berikut:

------------Quote ---------------
Tue 2012-04-24 16:30:05: Session 6720; child 4
Tue 2012-04-24 16:30:05: Accepting SMTP connection from
[203.116.16.148:58058] to [192.168.0.3:25]
Tue 2012-04-24 16:30:05: --> 220 mail.mscid.com ESMTP MDaemon 12.5.0; Tue,
24 Apr 2012 16:30:05 +0700
Tue 2012-04-24 16:30:05: <-- EHLO png1icomm2.portnet.com
Tue 2012-04-24 16:30:05: --> 250-mail.mscid.com Hello
png1icomm2.portnet.com, pleased to meet you
Tue 2012-04-24 16:30:05: --> 250-ETRN
Tue 2012-04-24 16:30:05: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Tue 2012-04-24 16:30:05: --> 250-8BITMIME
Tue 2012-04-24 16:30:05: --> 250 SIZE
Tue 2012-04-24 16:30:05: <-- MAIL From:<[email protected]>
SIZE=145827
Tue 2012-04-24 16:30:05: Performing PTR lookup (148.16.116.203.IN-ADDR.ARPA)
Tue 2012-04-24 16:30:08: *  Error: *  Name server reports domain name
unknown
Tue 2012-04-24 16:30:08: *  MDaemon configured to drop connection when
domain name unknown
Tue 2012-04-24 16:30:08: ---- End PTR results
Tue 2012-04-24 16:30:08: --> 501 Connecting IP must have valid PTR record
for 203.116.16.148
Tue 2012-04-24 16:30:08: SMTP session terminated (Bytes in/out: 81/274)
------------UnQuote ---------------

Saya sudah menambahkan IP 203.116.16.148 dan 148.16.116.203 di reverse
lookup white list, tapi email dari domain tersebut tetap tidak bisa masuk.

Mohon bantuannya.
Terima kasih.


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