[root@asterisk1 ~]# dig domain mx

; <<>> DiG 9.2.4 <<>> domain mx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 3465
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;domain.                                IN      MX

;; Query time: 12 msec
;; SERVER: 192.168.0.10#53(192.168.0.10)
;; WHEN: Thu Mar 20 10:31:21 2008
;; MSG SIZE  rcvd: 24