Linux Mail server

Dear Sir/Madam:

I have redhat enterprise linux ver 5 host name is parrot.abc.com the same is local name server for the internal resolving and this server also works as ftp server this is been assigned with the private ip address  i,e 192.168.1.250 and one more linux box works as a router DNAT and SNAT is done here so from the internet ftp server can be accessed similarly lan users can access the internet but now my requirement is :
To configure the server parrot.abc.com as a Mailserver for the different domain name xyz.com  
that is host name is parrot.abc.com but mail server should be for the xyz.com  please help me how to do this ,
Is it required to change the hostname but i do not want to do so .
please help.



D_wathiAsked:
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WizRd-LinuxCommented:
There is no need to change the hostname at all.

If you are using for example sake postfix, there is a line in the main.cf configuration file which specifies which domains to accept mail for, as long as the system has a valid user.

mydestination = mail.abc.com, parrot.abc.com, abc.com, mail.xyz.com, xyz.com


From there, your external box, which is doing the NAT for you just forwards port 25 traffic to this server.

From there, setup the domain xyz.com and point the MX record at your external NAT box.
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bevhostCommented:
If using sendmail add the names to /etc/mail/local-host-names

# telnet localhost 25
quit

to see which mail server you have.


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