Error during resolving the mx record for hostname and domain name

[pravin_a_18]

Please help me out....I m trying to install ZCS on Fedora 11
Before installation I configured named.conf as follows
// Default named.conf generated by install of bind-9.2.4-2
options {
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
forwarders { 192.168.0.110 ; };
};
include "/etc/rndc.key";
// We are the master server for server.example.com
zone "mail.example.com" {
type master;
file "db.mail.example.com";
};

and then created db.mail.example.com in var/named/ as follows

;
; Addresses and other host information.
;
@ IN SOA mail.example.com. root.mail.example.com. (
10118 ; Serial
43200 ; Refresh
3600 ; Retry
3600000 ; Expire
2592000 ) ; Minimum
; Define the nameservers and the mail servers
IN NS mail.example.com
IN A 192.168.0.20
IN MX 10 mail.example.com.

and then started named.conf successfully........

i got DNS error during installation saying that NO mx Records for locahost
and asked me to enter a new hostname but that to didnt work....the error i got is as follows

[root@localhost libexec]# ./zmsetup.pl
Operations logged to /tmp/zmsetup.10152009-131935.log
Installing LDAP configuration database...done.
Setting defaults...No results returned for A lookup of localhost
Checked nameservers:
127.0.0.1


DNS ERROR resolving localhost
It is suggested that the hostname be resolveable via DNS
Change hostname [Yes]
Please enter the logical hostname for this host [localhost] mail.example.com
MX: mail.example.com (192.168.0.20)
Interface: 127.0.0.1
192.168.0.20


DNS ERROR - none of the MX records for mail.example.com
resolve to this host
Change domain name? [Yes]
Create domain: [mail.example.com]
MX: mail.example.com (192.168.0.20)
Interface: 127.0.0.1
DNS ERROR - none of the MX records for mail.example.com
resolve to this host
It is suggested that the MX record resolve to this host
Re-Enter domain name? [Yes] No
done.
Checking for port conflicts
Note
The previous configuration appears to have failed to complete
Attempt to complete configuration now? [yes] Yes
Save configuration data to a file? [Yes]
Save config in file: [/opt/zimbra/config.14117]
Saving config in /opt/zimbra/config.14117...done.
The system will be modified - continue? [No] Y
Operations logged to /tmp/zmsetup.10152009-131935.log
Initializing ldap...failed. (25856)

so i want to ask if the files that i configured is right or should i add something more to it....please anyone help me out...

[phoenix]

so i want to ask if the files that i configured is right or should i add something more to it....please anyone help me out...

You need to have a valid hosts file, resolv.conf file and DNS A & MX records that point to your server. I'd suggest you read the Quick Start Installation Guide for the format of the hosts file. There are many posts (by me) in the forums that describe what you need to do and what information you need to post, please search for them.