Quote Originally Posted by kennethconn View Post
You do not need to go near DNS for your requirements.

https://help.ubuntu.com/12.04/server...iguration.html

If you have read and understood this, you should be able to get this set-up working (again, based on your requirements).
Pardon my ignorance, but what is the idea here? Using the local hosts file can help relate hostname with local IP, but wouldn't the email sending require MX record information? How can you implement that without your own DNS server in this case when you are working only with local domain??