國外的dns次網域真的有比較好嗎?

怕網站以及郵件因為dns掛掉而陣亡,所以另外設定了國外的次網域代管,想說一勞永逸,連客戶的也起遼下去,但是卻發現寄信似乎不太正常~也還在一直找問題

首先發生寄信發生退信,產生501 Domain must resolve,但這是專門寄信的ip ,將使用者的寄信主機改到主要的ip位置,這種狀況似乎就解決了,想起ip反解問題,



以為寄信主機沒有做反解,但是利用

C:\>nslookup
Default Server:  dns.hinet.net
Address:  168.95.1.1

> dns.hinet.net
Server:  dns.hinet.net
Address:  168.95.1.1

Non-authoritative answer:
Name:    dns.hinet.net
Address:  168.95.1.1

> set type=ptr
> 59.124.89.134
Server:  dns.hinet.net
Address:  168.95.1.1

Non-authoritative answer:
134.89.124.59.in-addr.arpa      name = mail.peacetour.com.tw

89.124.59.in-addr.arpa  nameserver = vns2.hinet.net
89.124.59.in-addr.arpa  nameserver = vns1.hinet.net
vns1.hinet.net  internet address = 168.95.192.3
vns2.hinet.net  internet address = 168.95.1.12
> 59.124.89.133
Server:  dns.hinet.net
Address:  168.95.1.1

Non-authoritative answer:
133.89.124.59.in-addr.arpa      name = mail.peacetour.com.tw

89.124.59.in-addr.arpa  nameserver = vns2.hinet.net
89.124.59.in-addr.arpa  nameserver = vns1.hinet.net
vns1.hinet.net  internet address = 168.95.192.3
vns2.hinet.net  internet address = 168.95.1.12

是ok的

於是二話不多說~ 直接先刪除掉國外次網域再說了

https://myblogvictory.blogspot.com/2010/08/dns.html?m=0