On 27/12/18 10.15, Thariq Basyir ([email protected]) wrote:
> user kami tidak menerima email dari client dengan domain *megapro.org
> <http://megapro.org>, setelah kami cek di log ada problem di DNS yang
> kami pakai (mohon dikoreksi kalau salah), akhirnya kami ganti ke DNS
> google. Tapi kok masih tidak diterima ya email dari client tersebut


Authoritative DNS domain megapro.org ada yang down sehingga terkadang
bisa resolve dan saat lain gagal di resolve.

$ host -t ns megapro.org
megapro.org name server backup.techscape.com.
megapro.org name server dns1.techscape16.com.

$ host -t mx megapro.org backup.techscape.com
;; connection timed out; no servers could be reached

Kalau pakai public DNS masih akan mendapat manfaat dari DNS cache.

$ host -t mx megapro.org 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:

megapro.org mail is handled by 0 megapro.org.

$ host -t mx megapro.org 1.1.1.1
Using domain server:
Name: 1.1.1.1
Address: 1.1.1.1#53
Aliases:

megapro.org mail is handled by 0 megapro.org.


> oh ya, kami memakai DNS yang nempel di windows server, bukan yang di MDaemon 
> aplikasinya pak


Tidak apa-2x seperti itu, yang penting semua DNS di windows tcp/ip telah
ditest dengan DNS benchmark.

https://www.mail-archive.com/[email protected]/msg22546.html

DNS resolver di windows tcp/ip prioritasnya lebih tinggi jika dipakai.


http://mdaemon.dutaint.co.id/mdaemon/18.5/index.html?default-domain-and-servers_dns.htm

Use Windows DNS servers

When this option is selected, MDaemon will use all DNS servers found
within your Windows TCP/IP configuration. MDaemon will try each DNS
server once per lookup operation and in sequence until it exhausts the
complete list of DNS servers or finds the first one that works. If you
include additional DNS servers in the Manually configured DNS Servers
option below, MDaemon will try those servers as well. Finally, at
startup the System log will display each DNS server and indicate its
source (i.e. manually configured or taken from Windows).


-- 
syafril
-------
Syafril Hermansyah
MDaemon-L Moderators, running MDaemon 18.5.1-64 bit
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