Pak ada domain phapros.co.id failed PTR check MD, tapi kalau saya check di web MXTOOLS reverselookup ip tersebut benar mengarah ke domain tersebut.
Kenapa di MD gagal ya ?

Mon 2022-12-12 13:21:48.513: [00731297] Session 00731297; child 0002
Mon 2022-12-12 13:21:48.513: [00731297] Accepting SMTP connection from 103.164.114.226:58180 to 192.168.10.2:25 Mon 2022-12-12 13:21:48.513: [00731297] Location Screen says connection is from Indonesia, Asia Mon 2022-12-12 13:21:48.532: [00731297] --> 220 webmail.pttdp.com ESMTP Mon, 12 Dec 2022 13:21:48 +0700
Mon 2022-12-12 13:21:48.552: [00731297] <-- EHLO mail.phapros.co.id
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-webmail.pttdp.com Hello mail.phapros.co.id [103.164.114.226], pleased to meet you
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-ETRN
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-AUTH LOGIN PLAIN
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-8BITMIME
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-ENHANCEDSTATUSCODES
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-PIPELINING
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-CHUNKING
Mon 2022-12-12 13:21:48.580: [00731297] --> 250-STARTTLS
Mon 2022-12-12 13:21:48.580: [00731297] --> 250 SIZE 36864000
Mon 2022-12-12 13:21:48.599: [00731297] <-- MAIL FROM:<[email protected]> SIZE=1861024 Mon 2022-12-12 13:21:48.611: [00731297] Performing PTR lookup (226.114.164.103.IN-ADDR.ARPA) Mon 2022-12-12 13:21:48.639: [00731297] * D=226.114.164.103.IN-ADDR.ARPA TTL=(60) PTR=[mail.phapros.co.id] Mon 2022-12-12 13:21:48.642: [00731297] * D=mail.phapros.co.id TTL=(1122) A=[103.41.204.10] Mon 2022-12-12 13:21:48.642: [00731297] * MDaemon configured to drop connection on PTR record mismatch
Mon 2022-12-12 13:21:48.642: [00731297] ---- End PTR results
Mon 2022-12-12 13:21:48.642: [00731297] --> 501 5.7.0 Domain must resolve
Mon 2022-12-12 13:21:48.642: [00731297] SMTP session terminated (Bytes in/out: 114/313)
--
--[mdaemon-l]----------------------------------------------------------
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