I have just followed Johnny Hughes' excellent walk-through on how to install Postfix, MailScanner with ClamAV and Spamassassin and it seems to be running fine during in house testing, but I want to make sure that it behaves itself when it goes live serving about 250 users; I have read comments elsewhere both for and against the use of Mailscanner with Postfix, and when I mentioned the subject on the Postfix group I was informed I *WILL* have mail dupes and missing mail so can I have some observations from people using this setup with Centos (3.3). Also, is there a good follow up to JH's article about using that configuration with virtual mailboxes or is it easy to take the setup as outlined and 'convert' it to use them? I'm on a steep learning curve as I pull myself away from the M$ camp! Thanks