[geeks] Quick Postfix Question

[Jon Still]

Folks,

I know quite a few of you seem to run Postfix as your MTA - I've got one 
tiny niggling problem that I'd like to fix.

When a message bounces (sent to either local or remote users), the 
bounce message is:

------
This is the Postfix program at host io.tertial.org.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

For further assistance, please send mail to <postmaster>
------

Now - how can I make this say <postmaster at tertial.org> instead of just 
<postmaster> ?  It's such a silly and simple problem yet I've not seen 
anything on the site or via Google...

Cheers,
Jon.

--
Jon Still                               E-mail: jrs at tertial.org
System Administrator                    Web:    http://www.tertial.org/
tertial.org