Selamat Siang Pak Syafril 

Mohon bantuannya, ada user kami yang tidak bisa menerima email dari luar 
berikut log SMTP – (IN) : 

Mon 2019-07-08 12:28:53.932: ----------
Mon 2019-07-08 12:28:53.283: [913427] Session 913427; child 0005
Mon 2019-07-08 12:28:53.283: [913427] Accepting SMTP connection from 
195.110.122.180:37591 to 172.16.0.6:25
Mon 2019-07-08 12:28:53.283: [913427] --> 220 bb.ptbmi.com ESMTP MDaemon 
18.5.2; Mon, 08 Jul 2019 12:28:53 +0700
Mon 2019-07-08 12:28:53.475: [913427] <-- EHLO authsmtp.register.it
Mon 2019-07-08 12:28:53.475: [913427] --> 250-bb.ptbmi.com Hello 
authsmtp.register.it [195.110.122.180], pleased to meet you
Mon 2019-07-08 12:28:53.475: [913427] --> 250-ETRN
Mon 2019-07-08 12:28:53.475: [913427] Location Screening hiding AUTH from 
country Italy
Mon 2019-07-08 12:28:53.475: [913427] --> 250-8BITMIME
Mon 2019-07-08 12:28:53.475: [913427] --> 250-ENHANCEDSTATUSCODES
Mon 2019-07-08 12:28:53.475: [913427] --> 250-STARTTLS
Mon 2019-07-08 12:28:53.475: [913427] --> 250 SIZE 35840000
Mon 2019-07-08 12:28:53.663: [913427] <-- STARTTLS
Mon 2019-07-08 12:28:53.663: [913427] --> 220 2.7.0 Ready to start TLS
Mon 2019-07-08 12:28:54.053: [913427] SSL negotiation successful (TLS 1.2, 521 
bit key exchange, 256 bit AES encryption)
Mon 2019-07-08 12:28:54.242: [913427] <-- EHLO authsmtp.register.it
Mon 2019-07-08 12:28:54.242: [913427] --> 250-bb.ptbmi.com Hello 
authsmtp.register.it [195.110.122.180], pleased to meet you
Mon 2019-07-08 12:28:54.242: [913427] --> 250-ETRN
Mon 2019-07-08 12:28:54.242: [913427] Location Screening hiding AUTH from 
country Italy
Mon 2019-07-08 12:28:54.242: [913427] --> 250-8BITMIME
Mon 2019-07-08 12:28:54.242: [913427] --> 250-ENHANCEDSTATUSCODES
Mon 2019-07-08 12:28:54.242: [913427] --> 250 SIZE 35840000
Mon 2019-07-08 12:28:54.432: [913427] <-- MAIL FROM:<[email protected]> 
SIZE=65981
Mon 2019-07-08 12:28:54.435: [913427] Performing PTR lookup 
(180.122.110.195.IN-ADDR.ARPA)
Mon 2019-07-08 12:28:54.632: [913427] *  D=180.122.110.195.IN-ADDR.ARPA 
TTL=(15) PTR=[authsmtp95.register.it]
Mon 2019-07-08 12:28:54.993: [913427] *  D=authsmtp95.register.it TTL=(120) 
A=[195.110.122.180]
Mon 2019-07-08 12:28:54.993: [913427] ---- End PTR results
Mon 2019-07-08 12:28:54.995: [913427] Performing IP lookup 
(authsmtp.register.it)
Mon 2019-07-08 12:28:55.139: [913427] *  D=authsmtp.register.it TTL=(1440) 
A=[81.88.48.66]
Mon 2019-07-08 12:28:55.139: [913427] ---- End IP lookup results
Mon 2019-07-08 12:28:55.141: [913427] --> 550 5.7.1 Sender unknown
Mon 2019-07-08 12:28:55.141: [913427] Host screening refused connection to 
172.16.0.6:25 from authsmtp95.register.it [195.110.122.180:37591] (matched to 
line "all authsmtp#.register.it refuse")
Mon 2019-07-08 12:28:55.142: [913427] SMTP session terminated (Bytes in/out: 
770/3833)
Mon 2019-07-08 12:28:55.142: ----------

Terdeteksi : 
Mon 2019-07-08 12:28:55.141: [913427] --> 550 5.7.1 Sender unknown
Mon 2019-07-08 12:28:55.141: [913427] Host screening refused connection to 
172.16.0.6:25 from authsmtp95.register.it [195.110.122.180:37591] (matched to 
line "all authsmtp#.register.it refuse")

Action : 
1. Menambahkan “all authsmtp95.register.it accept” di Hostscreen.dat 

atau 

2. menghapus "all authsmtp#.register.it refuse" / mengganti refuse menjadi 
accept di HostScreen.dat 
karena saya melihat beberapa email tersebut di refuse 

a) Mon 2019-07-08 12:28:55.141: [913427] Host screening refused connection to 
172.16.0.6:25 from authsmtp95.register.it [195.110.122.180:37591] (matched to 
line "all authsmtp#.register.it refuse")

b) Mon 2019-07-08 12:28:55.142: [913425] Host screening refused connection to 
172.16.0.6:25 from authsmtp90.register.it [195.110.122.175:60777] (matched to 
line "all authsmtp#.register.it refuse")

c) Mon 2019-07-08 12:28:55.144: [913426] Host screening refused connection to 
172.16.0.6:25 from authsmtp87.register.it [195.110.122.172:46713] (matched to 
line "all authsmtp#.register.it refuse")

d) Mon 2019-07-08 12:28:55.145: [913424] Host screening refused connection to 
172.16.0.6:25 from authsmtp74.register.it [195.110.101.58:47343] (matched to 
line "all authsmtp#.register.it refuse")

Mohon pencerahannya Pak Syafril 

Terimakasih
Rievo

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