Cannot get ip address of mx record kienhwa.hk

[Alex Tang]

Hi All

Sometimes my user cannot send email to kienhwa.hk. I find out that the dns server cannot get the ip address of the mx record at the same time.

> set q=mx
> kienhwa.hk
Server:         dns
Address:        

kienhwa.hk      mail exchanger = 10 kienhwa.hk.

but I can get the ip address of the mx by enter the host name only

> set q=a
> kienhwa.hk
Server:         dns
Address:        

Name:   kienhwa.hk
Address: 202.134.124.67

also the ttl of the domain is 0

> set q=soa
        origin = NS1.OGDNS.COM
        mail addr = NS1.OGDNS.COM
        serial = 1
        refresh = 10800
        retry = 3600
        expire = 86400
        minimum = 0

What cause the problem ?
My bind version is 8.3.7

Help Help 

Thx