Suse 7.2/7.3 and Postfix ... with Replex ?

Who's using Postfix ? Where I'm create email accounts ? I'm trying to use ONLY Webmin as administrator, because the client is a complete neofit in Linux/Unix and intend to administer everythinh by youself after instalation ! but I can't find in doumentation od Postfix or in the doc of Webmin anything about it ! And, as a choice, anyone use Replex ? (http://replex.org/) I'm trying to install it without success . Maybe it works only with Red Hat ? thanks .. Fábio Rabelo