I need a step by step procedure to:
Configure a Fedora Core 2 server as a Mail server with following:
Postfix
LDAP for authentication
Dovecot for IMAP server
Squirrelmail for webmail
SpamAssassin for spam protection
ClamAV for anti-virus
Must use maildir mailbox format

We need a secure IMAP server with web interface, the 2 critical items are:
1. Postfix
2. LDAP

I don't want to compile anything, just want to do a yum install or yum
update so the system maintains itself. Similarily, I want to configure
the server with a minimum number of modules.

I have a 50 user mail system that just crashed, it was a
Qmail/LDAP/Courier system, will need to copy the message store from
the old partition to the new system

The mail server serves one domain, however that domain has several
aliases, for example:
joe@sam.com is the main email address, however we want mail addressed
to the following addresses to be delivered to joe smith via his
joe@sam.com email address:
joe@sam.net
jsmith@sam.com