Dear Pak Syafril,
kami ada kendala untuk menerima email dari customer kami.
dari domain ms.huawei.com
berikut log nya pak:
Tue 2020-09-15 13:33:21: ----------Tue 2020-09-15 13:32:18: Session 489081; 
child 0003Tue 2020-09-15 13:32:18: Accepting SMTP connection from 
[45.249.212.56:2330] to [117.102.89.155:25]Tue 2020-09-15 13:32:18: --> 220 
mail.mandau.id ESMTP MDaemon 14.0.0; Tue, 15 Sep 2020 13:32:18 +0700Tue 
2020-09-15 13:32:18: <-- EHLO hwsga02-in.huaweimarine.comTue 2020-09-15 
13:32:18: --> 250-mail.mandau.id Hello hwsga02-in.huaweimarine.com, pleased to 
meet youTue 2020-09-15 13:32:18: --> 250-ETRNTue 2020-09-15 13:32:18: --> 
250-AUTH LOGIN CRAM-MD5 PLAINTue 2020-09-15 13:32:18: --> 250-8BITMIMETue 
2020-09-15 13:32:18: --> 250 SIZETue 2020-09-15 13:32:22: <-- MAIL 
FROM:<huaweipmows...@ms.huawei.com> SIZE=1398Tue 2020-09-15 13:32:22: 
Performing PTR lookup (56.212.249.45.IN-ADDR.ARPA)Tue 2020-09-15 13:32:22: *  
D=56.212.249.45.IN-ADDR.ARPA TTL=(60) PTR=[hwsga02-in.huaweimarine.com]Tue 
2020-09-15 13:32:22: *  Gathering A records...Tue 2020-09-15 13:33:22: *  No A 
records foundTue 2020-09-15 13:33:22: *  MDaemon configured to drop connection 
on PTR record miss-matchTue 2020-09-15 13:33:22: ---- End PTR resultsTue 
2020-09-15 13:33:22: --> 501 Domain must resolveTue 2020-09-15 13:33:22: SMTP 
session terminated (Bytes in/out: 86/239)Tue 2020-09-15 13:33:22: ----------

terima kasih atas bantuannya
Irwan
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