shell script to setup email server on centos

I want  a bash script which will automatically setup a given domain on fresh centos installation so server can receive emails for that domain.

is there any such script? or please guide me how I can do it.
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cjl7freelance for hireCommented:
What mail-server are you running?

If you are running postfix all you need to do is add a domain-name to a line in the config file and do a 'postfix reload'.

But you might wanna run vusers for your mailserver?

A fresh centos install is probably running sendmail. All you have to do is add the domain to /etc/mail/local-host-names and restart sendmail:

# echo "" >> /etc/mail/local-host-names && /etc/rc.d/init.d/sendmail restart

If you have iptables running, you might need to add a rule to allow incoming tcp/25. Add this line to /etc/sysconfig/iptables above the last reject/drop rule:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT

Then restart iptables too: # /etc/rc.d/init.d/iptables restart

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