> Koneksi dari sender server (Omaha, Nebraska, North America) lambat.
> Tunggu saja sender host retry to send, karena ketentuan regulasi internet > 
> mail memang mengharuskan sender retry to send.
> Selama ini server yahoo.com taat azas.

Ini ada lagi kasus, tapi dari beda domain Pak Syafril 
Berikut log errornya

Thu 2021-09-16 14:31:53.978: ----------
Thu 2021-09-16 14:27:01.403: [37792432] Session 37792432; child 0042
Thu 2021-09-16 14:27:01.403: [37792432] Accepting SMTP connection from 
220.181.13.115:45213 to 172.16.0.6:25
Thu 2021-09-16 14:27:01.403: [37792432] Location Screen says connection is from 
China, Asia
Thu 2021-09-16 14:27:01.404: [37792432] --> 220 bb.ptbmi.com ESMTP MDaemon 
21.0.3; Thu, 16 Sep 2021 14:27:01 +0700
Thu 2021-09-16 14:27:01.820: [37792432] <-- EHLO m13115.mail.163.com
Thu 2021-09-16 14:27:01.820: [37792432] --> 250-bb.ptbmi.com Hello 
m13115.mail.163.com [220.181.13.115], pleased to meet you
Thu 2021-09-16 14:27:01.820: [37792432] --> 250-ETRN
Thu 2021-09-16 14:27:01.820: [37792432] Location Screening hiding AUTH from 
country China, Asia
Thu 2021-09-16 14:27:01.820: [37792432] --> 250-8BITMIME
Thu 2021-09-16 14:27:01.820: [37792432] --> 250-ENHANCEDSTATUSCODES
Thu 2021-09-16 14:27:01.820: [37792432] --> 250-STARTTLS
Thu 2021-09-16 14:27:01.820: [37792432] --> 250 SIZE 36700160
Thu 2021-09-16 14:27:02.231: [37792432] <-- MAIL 
FROM:<junweiaquatic1...@163.com>
Thu 2021-09-16 14:27:02.235: [37792432] Performing PTR lookup 
(115.13.181.220.IN-ADDR.ARPA)
Thu 2021-09-16 14:27:02.243: [37792432] *  D=115.13.181.220.in-addr.arpa 
TTL=(1141) PTR=[m13115.mail.163.com]
Thu 2021-09-16 14:27:02.661: [37792432] *  D=m13115.mail.163.com TTL=(30) 
A=[220.181.13.115]
Thu 2021-09-16 14:27:02.661: [37792432] ---- End PTR results
Thu 2021-09-16 14:27:02.662: [37792432] Performing IP lookup 
(m13115.mail.163.com)
Thu 2021-09-16 14:27:02.696: [37792432] *  D=m13115.mail.163.com TTL=(30) 
A=[220.181.13.115]
Thu 2021-09-16 14:27:02.696: [37792432] ---- End IP lookup results
Thu 2021-09-16 14:27:02.699: [37792432] Performing IP lookup (163.com)
Thu 2021-09-16 14:27:02.805: [37792432] *  D=163.com TTL=(10) A=[123.58.180.8]
Thu 2021-09-16 14:27:02.805: [37792432] *  D=163.com TTL=(10) A=[123.58.180.7]
Thu 2021-09-16 14:27:02.812: [37792432] *  P=010 S=000 D=163.com TTL=(202) 
MX=[163mx01.mxmail.netease.com]
Thu 2021-09-16 14:27:02.812: [37792432] *  P=010 S=002 D=163.com TTL=(202) 
MX=[163mx02.mxmail.netease.com]
Thu 2021-09-16 14:27:02.812: [37792432] *  P=010 S=003 D=163.com TTL=(202) 
MX=[163mx03.mxmail.netease.com]
Thu 2021-09-16 14:27:02.812: [37792432] *  P=050 S=001 D=163.com TTL=(202) 
MX=[163mx00.mxmail.netease.com]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.138]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.142]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.136]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.140]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.135]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.143]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.141]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.137]
Thu 2021-09-16 14:27:03.048: [37792432] *  D=163mx01.mxmail.netease.com 
TTL=(10) A=[220.181.14.139]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.155]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.147]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.146]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.145]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.154]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.149]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.144]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.148]
Thu 2021-09-16 14:27:03.107: [37792432] *  D=163mx02.mxmail.netease.com TTL=(5) 
A=[220.181.14.150]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.164]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.157]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.161]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.160]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.156]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.159]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.158]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.163]
Thu 2021-09-16 14:27:03.350: [37792432] *  D=163mx03.mxmail.netease.com 
TTL=(10) A=[220.181.14.162]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.139]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.149]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.161]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.141]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.159]
Thu 2021-09-16 14:27:03.596: [37792432] *  D=163mx00.mxmail.netease.com 
TTL=(10) A=[220.181.14.145]
Thu 2021-09-16 14:27:03.596: [37792432] ---- End IP lookup results
Thu 2021-09-16 14:27:03.597: [37792432] Performing SPF lookup 
(m13115.mail.163.com / 220.181.13.115)
Thu 2021-09-16 14:27:04.577: [37792432] *  Result: none; no SPF record in DNS
Thu 2021-09-16 14:27:04.577: [37792432] ---- End SPF results
Thu 2021-09-16 14:27:04.578: [37792432] Performing SPF lookup (163.com / 
220.181.13.115)
Thu 2021-09-16 14:27:04.578: [37792432] *  Policy (cache): v=spf1 
include:spf.163.com wlinclude:gtrf.hsbc.com wlinclude:sucofindo.co.id 
wlinclude:mcisurveyors.co.id -all
Thu 2021-09-16 14:27:04.578: [37792432] *  Evaluating include:spf.163.com: 
performing lookup
Thu 2021-09-16 14:27:04.578: [37792432] *    Policy (cache): v=spf1 
include:a.spf.163.com include:b.spf.163.com include:c.spf.163.com 
include:d.spf.163.com include:e.spf.163.com include:f.spf.163.com -all
Thu 2021-09-16 14:27:04.578: [37792432] *    Evaluating include:a.spf.163.com: 
performing lookup
Thu 2021-09-16 14:27:04.578: [37792432] *      Policy (cache): v=spf1 
ip4:220.181.12.0/22 ip4:220.181.31.0/24 ip4:123.125.50.0/24 ip4:220.181.72.0/24 
ip4:123.58.178.0/24 ip4:123.58.177.0/24 ip4:113.108.225.0/24 
ip4:218.107.63.0/24 ip4:123.58.189.128/25 ip4:123.126.96.0/24 ip4:123.126.
Thu 2021-09-16 14:27:04.578: [37792432] *      Evaluating ip4:220.181.12.0/22: 
match
Thu 2021-09-16 14:27:04.578: [37792432] *    Evaluating include:a.spf.163.com: 
match
Thu 2021-09-16 14:27:04.578: [37792432] *  Evaluating include:spf.163.com: match
Thu 2021-09-16 14:27:04.578: [37792432] *  Result: pass
Thu 2021-09-16 14:27:04.578: [37792432] ---- End SPF results
Thu 2021-09-16 14:27:04.578: [37792432] --> 250 2.1.0 Sender OK
Thu 2021-09-16 14:27:05.903: [37792432] <-- RCPT TO:<wahy...@ptbmi.com>
Thu 2021-09-16 14:27:05.905: [37792432] wahy...@ptbmi.com is an alias for 
marketing.wahy...@ptbmi.com
Thu 2021-09-16 14:27:05.909: [37792432] --> 250 2.1.5 Recipient OK
Thu 2021-09-16 14:27:06.324: [37792432] <-- DATA
Thu 2021-09-16 14:27:06.325: [37792432] --> 354 Enter mail, end with 
<CRLF>.<CRLF>
Thu 2021-09-16 14:31:54.427: [37792432] Connection closed
Thu 2021-09-16 14:31:54.427: [37792432] SMTP session terminated (Bytes in/out: 
574942/321)
Thu 2021-09-16 14:31:54.427: ----------

Apakah permasalahannya sama ya Pak ?
Mohon pencerahannya

Terima Kasih
Rievo




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