DNS setup


I have four virtual hosts on my lynix machine. this machine is also DNS server.
and mail server. All four work with same mail server. I want to change one of them so the mail server be some other remote machine [exchange]

How should I set up MX record.

 NS      ns.mainhost.com.
 NS      ns2.mainhost.com.
 MX    10      servername.mainhost.com.

mainhost.com.        A

www             CNAME   mainhost.com.
ftp             CNAME   mainhost.com.
mail            CNAME   mainhost.com.
servername        A
*               A

and the host2's zone file that I want to change is like this

 NS      ns.mainhost.com.
 NS      ns2.mainhost.com.

*               A
host2.com.        A
www             CNAME   host2.com.
ftp             CNAME   host2.com.
mail            CNAME   host2.com.

so how I can change host2's zone file so its website be same on and its user@host2.com email and mail server be somewhere else, for example  points to

Who is Participating?
vtobusmanConnect With a Mentor Commented:
ok try this
  delete your
mail            CNAME   mainhost.com.
  from mainhost.com.        A
then create an "A" record for the domain it will have
                mainhost.com.     by default  add mail to it like this
 and then enter the desired ip address
you mx will point it to the mail.mainhost.com
the a record you create will point it to where ever you need it to go..
Nav444Author Commented:
thanks for your posting.
I think this is will change the mail server for all 4 hosts!!

I want to keep www.mainhost.com and user@mainhost.com and www.host2.com all at same machine. But only mailserver for user@host2.com change to other remote machine.

Infact I think I should not change he setting for mainhost.com. I should change the setting for host2.com.

Nav444Author Commented:
I set things somehow, but I got relay access denied, so I set the mailserver which is an exchange to accept the DNS server IP.

So now it gives this error.

The following recipient(s) could not be reached:

      'mike@host2.com' on 11/4/2003 4:36 PM
            The destination server for this recipient could not be found in Domain Name Service (DNS).  Please verify the email address and retry.  If that fails, contact your administrator.
            <servername.LA.machinename.local #5.4.0>

What could be the reason. Infact no domain name is asigned to ip address of this machine. Is that the reason!!

God, this is getting to confusing. Please some one help. I guess it is very simple for people know this. I am ready to explain everything from beging.


even easier...
 on you mail server set it to forward the mail for that user to the other server...

you cant do it in dns....
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