Dear Pak Syafril,
Beberapa kali kami tidak menerima e-mail dengan keterangan
mail1.bemta33.sdw.messagelabs.com host can't be resolved, kira-kira root
causenya apa ya, apakah terkait tidak punya PTR ya ?, berikut logsnya :
Fri 2022-01-21 07:05:48.087: --
Fri 2022-01-21 07:05:47.828: [938652] Session 938652; child 0005
Fri 2022-01-21 07:05:47.828: [938652] Accepting SMTP connection from
67.219.247.1:53924 to 192.168.1.19:25
Fri 2022-01-21 07:05:47.829: [938652] --> 220 mail.aio.co.id ESMTP Fri, 21 Jan
2022 07:05:47 +0700
Fri 2022-01-21 07:05:48.081: [938652] <-- EHLO mail1.bemta33.sdw.messagelabs.com
Fri 2022-01-21 07:05:48.082: [938652] --> 250-mail.aio.co.id Hello
mail1.bemta33.sdw.messagelabs.com [67.219.247.1], pleased to meet you
Fri 2022-01-21 07:05:48.082: [938652] --> 250-ETRN
Fri 2022-01-21 07:05:48.082: [938652] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Fri 2022-01-21 07:05:48.082: [938652] --> 250-8BITMIME
Fri 2022-01-21 07:05:48.082: [938652] --> 250-ENHANCEDSTATUSCODES
Fri 2022-01-21 07:05:48.082: [938652] --> 250 SIZE 52428800
Fri 2022-01-21 07:05:48.333: [938652] <-- MAIL FROM:
Fri 2022-01-21 07:05:48.335: [938652] Performing PTR lookup
(1.247.219.67.IN-ADDR.ARPA)
Fri 2022-01-21 07:05:48.352: [938652] * D=1.247.219.67.IN-ADDR.ARPA TTL=(58)
PTR=[mail1.bemta33.messagelabs.com]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.117]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.2]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.4]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.214]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.212]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.210]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.213]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.5]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.8]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.119]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.115]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.112]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.1]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.209]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.7]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.215]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.208]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.6]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.3]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.114]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.211]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.113]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.116]
Fri 2022-01-21 07:05:48.380: [938652] * D=mail1.bemta33.messagelabs.com
TTL=(60) A=[67.219.247.118]
Fri 2022-01-21 07:05:48.380: [938652] End PTR results
Fri 2022-01-21 07:05:48.383: [938652] Performing IP lookup
(mail1.bemta33.sdw.messagelabs.com)
Fri 2022-01-21 07:05:48.561: [938652] * DNS server reports domain name unknown
Fri 2022-01-21 07:05:48.561: [938652] End IP lookup results
Fri 2022-01-21 07:05:48.561: [938652] --> 501 5.7.0
mail1.bemta33.sdw.messagelabs.com host can't be resolved
Fri 2022-01-21 07:05:48.561: [938652] SMTP session terminated (Bytes in/out:
79/321)
Fri 2022-01-21 07:05:48.561: --
Best Regards,
Slamet Raharjo
IT Dept.
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