mail address aliasing

[makeshifttheory]

Right now I have postfix relay setup configured through gmail's smtp. Is it possible to have the mail displayed from my server rather then my account at gmail? Whenever I send a email now it shows up like the follow:

To: *********@yahoo.com
Subject: test
Date: Mon, 12 Jun 2006 17:00:36 -0400 (EDT)
From: "root" <********@gmail.com> Add to Address Book Add Mobile Alert
Yahoo! DomainKeys has confirmed that this message was sent by gmail.com.

So is it possible to change the gmail part?

[falko]

Make sure you set a full email address when sending mails, not just root or any other username.