Siang Pak Syafril,

Mohon bantuan analisanya kenapa email dari domain
klinikdiabetesnusantara.com tidak bisa ke anjhealthcare.com ya, sebaliknya
dari anjhealthcare.com ke klinikdiabetesnusantara.com bisa?

Hasil dari log MDaemon:
Mon 2020-03-16 11:05:04.100: ----------
Mon 2020-03-16 11:05:13.134: Session 345377; child 0001
Mon 2020-03-16 11:05:13.135: Accepting SMTP connection from
103.25.223.198:48947 to 172.16.24.23:25
Mon 2020-03-16 11:05:14.681: Performing PTR lookup
(198.223.25.103.IN-ADDR.ARPA)
Mon 2020-03-16 11:05:14.704: *  D=198.223.25.103.in-addr.arpa TTL=(201)
PTR=[mxserver16-out7.masterweb.net]
Mon 2020-03-16 11:05:14.758: *  No A/AAAA records found
Mon 2020-03-16 11:05:14.759: ---- End PTR results
Mon 2020-03-16 11:05:14.759: --> 220 anjhealthcare.com ESMTP Mon, 16 Mar
2020 11:05:14 +0700
Mon 2020-03-16 11:05:14.762: <-- EHLO mxserver16-out7.masterweb.net
Mon 2020-03-16 11:05:14.769: Performing SPF lookup
(mxserver16-out7.masterweb.net / 103.25.223.198)
Mon 2020-03-16 11:05:14.821: *  Result: none; no SPF record in DNS
Mon 2020-03-16 11:05:14.821: ---- End SPF results
Mon 2020-03-16 11:05:14.822: --> 250-anjhealthcare.com Hello
mxserver16-out7.masterweb.net [103.25.223.198], pleased to meet you
Mon 2020-03-16 11:05:14.823: --> 250-ETRN
Mon 2020-03-16 11:05:14.823: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2020-03-16 11:05:14.823: --> 250-8BITMIME
Mon 2020-03-16 11:05:14.823: --> 250-ENHANCEDSTATUSCODES
Mon 2020-03-16 11:05:14.823: --> 250-STARTTLS
Mon 2020-03-16 11:05:14.823: --> 250 SIZE
Mon 2020-03-16 11:05:14.826: <-- STARTTLS
Mon 2020-03-16 11:05:14.826: --> 220 2.7.0 Ready to start TLS
Mon 2020-03-16 11:05:14.840: SSL negotiation successful (TLS 1.2, 256 bit
key exchange, 256 bit AES encryption)
Mon 2020-03-16 11:05:14.844: <-- EHLO mxserver16-out7.masterweb.net
Mon 2020-03-16 11:05:14.851: Performing SPF lookup
(mxserver16-out7.masterweb.net / 103.25.223.198)
Mon 2020-03-16 11:05:14.875: *  Result: none; no SPF record in DNS
Mon 2020-03-16 11:05:14.875: ---- End SPF results
Mon 2020-03-16 11:05:14.875: --> 250-anjhealthcare.com Hello
mxserver16-out7.masterweb.net [103.25.223.198], pleased to meet you
Mon 2020-03-16 11:05:14.875: --> 250-ETRN
Mon 2020-03-16 11:05:14.875: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2020-03-16 11:05:14.875: --> 250-8BITMIME
Mon 2020-03-16 11:05:14.875: --> 250-ENHANCEDSTATUSCODES
Mon 2020-03-16 11:05:14.875: --> 250 SIZE
Mon 2020-03-16 11:05:14.879: <-- MAIL
FROM:<[email protected]> SIZE=4903
Mon 2020-03-16 11:05:14.891: Performing IP lookup
(mxserver16-out7.masterweb.net)
Mon 2020-03-16 11:05:14.919: *  DNS server reports domain name unknown
Mon 2020-03-16 11:05:14.919: ---- End IP lookup results
Mon 2020-03-16 11:05:14.920: --> 501 5.7.0 mxserver16-out7.masterweb.net
host can't be resolved
Mon 2020-03-16 11:05:14.921: SMTP session terminated (Bytes in/out:
758/2262)
Mon 2020-03-16 11:05:14.921: ----------

Pesan error di user adalah sbb:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    host mail.anjhealthcare.com [202.153.232.10]
    SMTP error from remote mail server after MAIL
FROM:<[email protected]> SIZE=4903:
    501 5.7.0 mxserver16-out7.masterweb.net host can't be resolved

Mohon bantuannya.

Terima kasih.
Hengga 



----------------------------------------------
ANJ HealthCare

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