[Mailman-Users] changing domain name

[David]

I've just my first (successful) install and test. 

Mailman uses the qualified host name as the URL for mail and www. Is there
any way that I can change that to a different (valid) domain for this
machine?

eg: 	
	test at fast.kenpro.com.au 
becomes test at validdomainname.com.au

	http://fast.kenpro.com.au/mailman/admin/test 
becomes	http://www.validdomainname.com.au/mailman/admin/test

TIA,

David

(PS: thanks for earlier help - it turns out you really DO have to set up
cron entries, or nothing works... dumb me)