[ahhow]

i post thease information to beg anyone can give me a help :

cat /etc/hosts
root@mail:~# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
222.215.22.172 mail.xxxxxx.vn mail

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

cat /etc/resolv.conf
root@mail:~# cat /etc/resolv.conf
domain xxxxxx.vn
search xxxxxx.vn
nameserver 222.215.22.172

dig xxxxxx.vn mx
root@mail:~# dig xxxxxx.vn mx

; <<>> DiG 9.4.2-P2 <<>> xxxxxx.vn mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 60669
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;xxxxxx.vn. IN MX

;; Query time: 0 msec
;; SERVER: 222.215.22.172#53(222.215.22.172)
;; WHEN: Mon Oct 5 00:55:43 2009
;; MSG SIZE rcvd: 27

dig xxxxxx.vn any
root@mail:~# dig xxxxxx.vn any

; <<>> DiG 9.4.2-P2 <<>> xxxxxx.vn any
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 14380
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;xxxxxx.vn. IN ANY

;; Query time: 0 msec
;; SERVER: 222.215.22.172#53(222.215.22.172)
;; WHEN: Mon Oct 5 00:56:36 2009
;; MSG SIZE rcvd: 27

host 'hostname'
root@mail:~# host 'hostname'
Host hostname not found: 3(NXDOMAIN)


Please help me!!!Please...

PS. i disable my apparmor and clear the tabs to spaces in "db.xxxxxx.vn"