On 2014-10-27 16:55, Ahmad Ardiansyah wrote:
> Mon 2014-10-27 16:26:08: [948618] Performing PTR lookup
> (147.132.170.134.IN-ADDR.ARPA)
> Mon 2014-10-27 16:26:48: [948618] *  DNS: 40 second wait for DNS
> response exceeded (DNS Server: 209.244.0.3)
> Mon 2014-10-27 16:27:28: [948618] *  DNS: 40 second wait for DNS
> response exceeded (DNS Server: 209.244.0.4)
> Mon 2014-10-27 16:27:28: [948618] *  No PTR records found

Harusnya ada PTR recordnya, hanya tidak match dengan SMTP banner (FQDN
host), tetapi mestinya tidak menjadi masalah di versi MDaemon yang Anda
pakai sekarang karena PTR record itu forward-confirm Reverse DNS.

http://en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS

$ host 134.170.132.147 209.244.0.3
Using domain server:
Name: 209.244.0.3
Address: 209.244.0.3#53
Aliases:

147.132.170.134.in-addr.arpa domain name pointer
mail-sg1on0147.outbound.protection.outlook.com.

$ host mail-sg1on0147.outbound.protection.outlook.com 209.244.0.4
Using domain server:
Name: 209.244.0.4
Address: 209.244.0.4#53
Aliases:

mail-sg1on0147.outbound.protection.outlook.com has address 134.170.132.147

sementara FQDN hostnya terdaftar di internet.

$ host APAC01-HK1-obe.outbound.protection.outlook.com
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.123
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.124
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.125
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.126
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.117
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.118
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.119
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.120
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.121
APAC01-HK1-obe.outbound.protection.outlook.com has address 207.46.51.122


> apakah ada solusi agar error ini tidak muncul kembali ?

Mungkin karena koneksi internet Anda sibuk sehingga akses ke public DNS
jadi gagal
Coba naikkan idle time out DNS lookup sampai nilai maksimum

http://mdaemon.dutaint.co.id/14.5/index.html?default-domain-and-servers_timouts.htm

Wait 60 seconds for MX DNS server responses
Wait 60 seconds for A-Record DNS server responses

Kalau masih terkadang gagal, lakukan DNS benchmark

http://www.mail-archive.com/mdaemon-l%40dutaint.com/msg22546.html

lihat cara pakai/test nya disini

https://www.grc.com/dns/operation.htm

Yang dimasukkan dalam test adalah :
209.244.0.3
209.244.0.4
8.8.8.8
8.8.4.4
202.146.0.8
202.146.0.5

Boleh saja ditambahkan public DNS lain yang ada didaftar

http://pcsupport.about.com/od/tipstricks/a/free-public-dns-servers.htm

4 DNS hasil rekomendasi terbaik dari test itu digunakan di MDaemon DNS
resolver.

Jika masih sering gagal juga, maka Anda perlu install DNS resolver
sendiri di MDaemon server sebagai primary DNS resolver.
Saya pakai simpleDNS (http://www.simpleDNS.com) di semua server kami,
baik untuk authoritative DNS dan atau DNS resolver untuk MDaemon maupun
local DNS di LAN sejak beberapa tahun yl, selama ini ok hasilnya.

-- 
syafril
-------
Syafril Hermansyah
MDaemon-L Moderators, running MDaemon 14.5-64, SP 4.5-64
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        --- John Quincy Adams


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