domain names

HI,
I have a small network in which i use the domain name mydomain.com
this not registered. I have setup postfix as a mail server.
collecting mail is fine, when sending mail arrives at the receiver ok
but the return address is xyz.mydomain.com. How can I setup postfix to
apply the isp's domain name instead of mydomain.

Thanx

There's several different ways to control what the From: header says.
You can use your mail client to do it, or in postfix, you can set the
$mydomain variable to whatever you want, or you can play with address
masquerading.


In article <jbsmith1-21D2B0.20272707122003@news.iprimus.com.au>, Julian
Smith wrote:
> HI, I have a small network in which i use the domain name mydomain.com
> this not registered. I have setup postfix as a mail server.
> collecting mail is fine, when sending mail arrives at the receiver ok
> but the return address is xyz.mydomain.com. How can I setup postfix to
> apply the isp's domain name instead of mydomain.
>
> Thanx