Dear Pak Syafril,
Saya ada issue, berikut MX yang handling domain aio.co.id, sbb :
Pref Hostname IP Address
10 mail.aio.co.id 202.158.62.55
20 mx-corp3.cbn.net.id 210.210.188.51
Nah, Issue pertama adalah, banyak e-mail yang berasal dari office365 (mungkin
exchange online 365) yang mengirimkan e-mail tidak ke MX utama saya
(mail.aio.co.id) tetapi ke MX Backup (mx-corp3.cbn.net.id),
Yang jadi issue adalah kenapa hal ini bisa terjadi ya, klo saya test kirim
e-mail dari gmail ke aio.co.id maka akan selalu ke MX utama saya.
Kemudian issue kedua, karena si CBN ini IPnya berubah-ubah (gak punya valid
PTR, maka pada saat meneruskan e-mail ke MX utama saya (mail.aio.co.id) maka di
drop, ini juga saya lagi complain ke CBN, kok EHLO mx-corp3.cbn.net.id ini
IPnya beubah-bah terus gak konsisten, mestinya IPnya sesuai dengan definisi MX
di atas yaitu --> 20 mx-corp3.cbn.net.id 210.210.188.51
Berikut logs-logs Dropnya, solusi sementara saya sudah whitelist IP-IP yang gak
konsisten tersebut di MDaemon (mail.aio.co.id) agar tidak di Drop, sbb :
Mon 2024-03-04 11:18:13.684: [13505064] Session 13505064; child 0003
Mon 2024-03-04 11:18:13.684: [13505064] Accepting SMTP connection from
210.210.188.94:22624 to 192.168.1.19:25
Mon 2024-03-04 11:18:13.684: [13505064] Location Screen says connection is from
Indonesia, Asia
Mon 2024-03-04 11:18:13.685: [13505064] --> 220 mail.aio.co.id ESMTP MDaemon
23.0.1; Mon, 04 Mar 2024 11:18:13 +0700
Mon 2024-03-04 11:18:13.688: [13505064] <-- EHLO mx-corp3.cbn.net.id
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-mail.aio.co.id Hello
mx-corp3.cbn.net.id [210.210.188.94], pleased to meet you
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-ETRN
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-8BITMIME
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-ENHANCEDSTATUSCODES
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-PIPELINING
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-CHUNKING
Mon 2024-03-04 11:18:13.688: [13505064] --> 250-STARTTLS
Mon 2024-03-04 11:18:13.688: [13505064] --> 250 SIZE 52428800
Mon 2024-03-04 11:18:13.689: [13505064] <-- MAIL FROM:<y_nak...@otsuka.jp>
SIZE=290350 BODY=8BITMIME
Mon 2024-03-04 11:18:13.691: [13505064] Performing PTR lookup
(94.188.210.210.IN-ADDR.ARPA)
Mon 2024-03-04 11:18:13.693: [13505064] * D=94.188.210.210.IN-ADDR.ARPA
TTL=(1254) PTR=[ip-210.188.94.cbn.net.id]
Mon 2024-03-04 11:18:13.694: [13505064] * D=ip-210.188.94.cbn.net.id TTL=(54)
A=[1.2.3.4]
Mon 2024-03-04 11:18:13.694: [13505064] * MDaemon configured to drop
connection on PTR record mismatch
Mon 2024-03-04 11:18:13.694: [13505064] ---- End PTR results
Mon 2024-03-04 11:18:13.694: [13505064] --> 501 5.7.0 Domain must resolve
Mon 2024-03-04 11:18:13.694: [13505064] SMTP session terminated (Bytes in/out:
84/301)
Mon 2024-03-04 15:29:47.176: [13525835] Session 13525835; child 0004
Mon 2024-03-04 15:29:47.176: [13525835] Accepting SMTP connection from
210.210.188.95:33671 to 192.168.1.19:25
Mon 2024-03-04 15:29:47.176: [13525835] Location Screen says connection is from
Indonesia, Asia
Mon 2024-03-04 15:29:47.177: [13525835] --> 220 mail.aio.co.id ESMTP MDaemon
23.0.1; Mon, 04 Mar 2024 15:29:47 +0700
Mon 2024-03-04 15:29:47.180: [13525835] <-- EHLO mx-corp3.cbn.net.id
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-mail.aio.co.id Hello
mx-corp3.cbn.net.id [210.210.188.95], pleased to meet you
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-ETRN
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-8BITMIME
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-ENHANCEDSTATUSCODES
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-PIPELINING
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-CHUNKING
Mon 2024-03-04 15:29:47.181: [13525835] --> 250-STARTTLS
Mon 2024-03-04 15:29:47.181: [13525835] --> 250 SIZE 52428800
Mon 2024-03-04 15:29:47.182: [13525835] <-- MAIL FROM:<kitan...@otsuka.jp>
SIZE=16359 BODY=8BITMIME
Mon 2024-03-04 15:29:47.183: [13525835] Performing PTR lookup
(95.188.210.210.IN-ADDR.ARPA)
Mon 2024-03-04 15:29:47.185: [13525835] * D=95.188.210.210.IN-ADDR.ARPA
TTL=(239) PTR=[ip-210.188.95.cbn.net.id]
Mon 2024-03-04 15:29:47.186: [13525835] * D=ip-210.188.95.cbn.net.id
TTL=(1305) A=[1.2.3.4]
Mon 2024-03-04 15:29:47.186: [13525835] * MDaemon configured to drop
connection on PTR record mismatch
Mon 2024-03-04 15:29:47.186: [13525835] ---- End PTR results
Mon 2024-03-04 15:29:47.186: [13525835] --> 501 5.7.0 Domain must resolve
Mon 2024-03-04 15:29:47.186: [13525835] SMTP session terminated (Bytes in/out:
83/301)
Mon 2024-03-04 15:29:47.187: ----------
Mon 2024-03-04 00:05:11.770: [13477570] Session 13477570; child 0003
Mon 2024-03-04 00:05:11.770: [13477570] Accepting SMTP connection from
210.210.188.96:33851 to 192.168.1.19:25
Mon 2024-03-04 00:05:11.770: [13477570] Location Screen says connection is from
Indonesia, Asia
Mon 2024-03-04 00:05:11.772: [13477570] --> 220 mail.aio.co.id ESMTP MDaemon
23.0.1; Mon, 04 Mar 2024 00:05:11 +0700
Mon 2024-03-04 00:05:11.774: [13477570] <-- EHLO mx-corp3.cbn.net.id
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-mail.aio.co.id Hello
mx-corp3.cbn.net.id [210.210.188.96], pleased to meet you
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-ETRN
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-8BITMIME
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-ENHANCEDSTATUSCODES
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-PIPELINING
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-CHUNKING
Mon 2024-03-04 00:05:11.774: [13477570] --> 250-STARTTLS
Mon 2024-03-04 00:05:11.774: [13477570] --> 250 SIZE 52428800
Mon 2024-03-04 00:05:11.776: [13477570] <-- MAIL FROM:<> SIZE=9663 BODY=8BITMIME
Mon 2024-03-04 00:05:11.779: [13477570] Performing PTR lookup
(96.188.210.210.IN-ADDR.ARPA)
Mon 2024-03-04 00:05:11.784: [13477570] * D=96.188.210.210.IN-ADDR.ARPA
TTL=(1440) PTR=[ip-210.188.96.cbn.net.id]
Mon 2024-03-04 00:05:11.788: [13477570] * D=ip-210.188.96.cbn.net.id
TTL=(1440) A=[1.2.3.4]
Mon 2024-03-04 00:05:11.788: [13477570] * MDaemon configured to drop
connection on PTR record mismatch
Mon 2024-03-04 00:05:11.788: [13477570] ---- End PTR results
Mon 2024-03-04 00:05:11.788: [13477570] --> 501 5.7.0 Domain must resolve
Mon 2024-03-04 00:05:11.788: [13477570] SMTP session terminated (Bytes in/out:
64/301)
Mohon pencerahannya.
Best Regards,
Slamet Raharjo
IT Dept.
--
--[mdaemon-l]----------------------------------------------------------
Milis ini untuk Diskusi antar pengguna MDaemon Mail Server di Indonesia
Netiket: https://wiki.openstack.org/wiki/MailingListEtiquette
Arsip: http://mdaemon-l.dutaint.com
Dokumentasi : http://mdaemon.dutaint.com
Berlangganan: Kirim mail ke mdaemon-l-subscr...@dutaint.com
Henti Langgan: Kirim mail ke mdaemon-l-unsubscr...@dutaint.com
Versi terakhir: MDaemon 23.5.2, SecurityGateway 9.5.3
