Selamat sore Pak Syafril,

Boleh minta tolong analisa SMTP(Out) dibawah ini :

Wed 2016-03-30 16:13:07.987: 05: [945962] Session 945962; child 0010
Wed 2016-03-30 16:13:07.987: 01: [945962] Parsing message
<d:\mdaemon\remoteq\retry\pd90000115802.msg>
Wed 2016-03-30 16:13:07.988: 01: [945962] *  From: te...@issu.co.id
Wed 2016-03-30 16:13:07.988: 01: [945962] *  To: samue...@cbn.net.id
Wed 2016-03-30 16:13:07.988: 01: [945962] *  Subject: Revisi BEU FS FEB 2016
Wed 2016-03-30 16:13:07.988: 01: [945962] *  Size (bytes): 1030761
Wed 2016-03-30 16:13:07.988: 01: [945962] *  Message-ID:
<001401d18a59$761783b0$62468b10$@co.id>
Wed 2016-03-30 16:13:07.999: 05: [945962] Resolving MX record for cbn.net.id
(DNS Server: 4.2.2.1)...
Wed 2016-03-30 16:13:08.221: 05: [945962] *  P=020 S=000 D=cbn.net.id
TTL=(13) MX=[mx.cbn.net.id]
Wed 2016-03-30 16:13:08.221: 05: [945962] Attempting SMTP connection to
mx.cbn.net.id
Wed 2016-03-30 16:13:08.221: 05: [945962] Resolving A record for
mx.cbn.net.id (DNS Server: 4.2.2.1)...
Wed 2016-03-30 16:13:08.439: 05: [945962] *  D=mx.cbn.net.id TTL=(23)
A=[210.210.188.26]
Wed 2016-03-30 16:13:08.439: 05: [945962] *  D=mx.cbn.net.id TTL=(23)
A=[202.158.81.26]
Wed 2016-03-30 16:13:08.439: 05: [945962] Randomly picked 202.158.81.26
from list of possible hosts
Wed 2016-03-30 16:13:08.439: 05: [945962] Attempting SMTP connection to
202.158.81.26:25
Wed 2016-03-30 16:13:08.439: 05: [945962] Waiting for socket connection...
Wed 2016-03-30 16:13:08.449: 05: [945962] *  Connection established
118.97.92.178:55991 --> 202.158.81.26:25
Wed 2016-03-30 16:13:08.449: 05: [945962] Waiting for protocol to start...
Wed 2016-03-30 16:13:09.231: 02: [945962] <-- 220 mx.cbn.net.id ESMTP
Wed 2016-03-30 16:13:09.232: 03: [945962] --> EHLO mail.issu.co.id
Wed 2016-03-30 16:13:09.242: 02: [945962] <-- 250-mx.cbn.net.id Hello
mail.issu.co.id [118.97.92.178]
Wed 2016-03-30 16:13:09.242: 02: [945962] <-- 250-SIZE 26214400
Wed 2016-03-30 16:13:09.242: 02: [945962] <-- 250-8BITMIME
Wed 2016-03-30 16:13:09.242: 02: [945962] <-- 250-PIPELINING
Wed 2016-03-30 16:13:09.242: 02: [945962] <-- 250 HELP
Wed 2016-03-30 16:13:09.242: 03: [945962] --> MAIL From:<te...@issu.co.id>
SIZE=1030761
Wed 2016-03-30 16:13:09.882: 02: [945962] <-- 250 OK
Wed 2016-03-30 16:13:09.882: 03: [945962] --> RCPT To:<samue...@cbn.net.id>
Wed 2016-03-30 16:13:11.397: 02: [945962] <-- 250 Accepted
Wed 2016-03-30 16:13:11.397: 03: [945962] --> DATA
Wed 2016-03-30 16:13:11.407: 02: [945962] <-- 354 Enter message, ending
with "." on a line by itself
Wed 2016-03-30 16:13:11.407: 05: [945962] Sending
<d:\mdaemon\remoteq\retry\pd90000115802.msg> to [202.158.81.26]
Wed 2016-03-30 16:24:05.328: 05: [945962] Transfer Complete
Wed 2016-03-30 16:24:05.346: 02: [945962] <-- 451 Error while writing spool
file
Wed 2016-03-30 16:24:05.346: 03: [945962] --> QUIT
Wed 2016-03-30 16:24:05.352: 02: [945962] <-- 221 mx.cbn.net.id closing
connection
Wed 2016-03-30 16:24:05.352: 01: [945962] *  This message is 0 days old; it
has 2 days left to get delivered
Wed 2016-03-30 16:24:05.353: 04: [945962] SMTP session terminated (Bytes
in/out: 293/1030875)

Email selalu masuk ke retry queue.  Kira2 error 451 ini kenapa ya Pak?

Terima kasih sebelumnya,
Rusdi

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