> The hosts file should only contain the IP address of your LAN server.
I have entered the gateway and DNS server IP addresses instead. So, it should be the local IP address (not public IP) of the server that Zimbra run on which is 192.168.190.250?
I dig the wrong domain, it should be zimbra.mydomain.com which is the domain that my Zimbra run on, mydomain.com is the main domain. So the result is as followed:
dig mydomain mx
; <<>> DiG 9.4.2-P2 <<>> zimbra.mydomain mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 52089
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;zimbra.mydomain. IN MX
;; AUTHORITY SECTION:
com. 900 IN SOA a.gtld-servers.net nstld.verisign-grs.com. 1257243961 1800 900 604800 86400
;; Query time: 8 msec
;; SERVER: 192.168.190.250#53(192.168.190.250)
;; WHEN: Tue Nov 3 18:26:12 2009
;; MSG SIZE rcvd: 115
dig mydomain any
; <<>> DiG 9.4.2-P2 <<>> zimbra.mydomain any
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 32681
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;zimbra.mydomain. IN ANY
;; AUTHORITY SECTION:
com. 544 IN SOA a.gtld-servers.net nstld.verisign-grs.com. 1257243961 1800 900 604800 86400
;; Query time: 2 msec
;; SERVER: 192.168.190.250#53(192.168.190.250)
;; WHEN: Tue Nov 3 18:32:08 2009
;; MSG SIZE rcvd: 115  |