I. Download and Install the APT Package Manager for RPM from http://www.freshrpms.net. 

This package manager ensures easy installation of any needed software and is much faster than up2date/Fedora mirrors.

$ su -
# wget http://ftp.freshrpms.net/pub/freshrpms/fedora/linux/1/apt/apt-devel-0.5.15cnc3-0.1.fr.i386.rpm
# wget http://ftp.freshrpms.net/pub/freshrpms/fedora/linux/1/apt/apt-0.5.15cnc3-0.1.fr.i386.rpm
# rpm -ivh apt*

The postgres, mysql, and openldap packages are only needed to satisfy Courier Imap spec files. These packages will not
 be needed or installed.

# apt-get update
# apt-get install postgresql-devel
# apt-get install mysql-devel
# apt-get install openldap-servers
# apt-get install perl-Digest-SHA1
# exit

II. Build the RPM Development Directory Structure for Courier Imap and Maildrop

The Courier Imap and Maildrop packages come bundled with preconfigured spec files. They can be built as a regular user 
straight from the source zip files. 

$ mkdir rpmbuild
$ cd rpmbuild
$ mkdir BUILD  RPMS  SOURCES  SPECS  SRPMS
$ cd RPMS
$ mkdir i386 i586 i686
$ cd ../SRPMS
$ mkdir i386 i586 i686
$ cd $HOME
$ vi .rpmmacros 
%_topdir        %(echo $HOME)/rpmbuild
%debug_package  %{nil}

III. Build the Courier IMAP and Maildrop RPM Packages

$ cd $HOME
$ wget http://unc.dl.sourceforge.net/sourceforge/courier/courier-2.2.1.tar.bz2
$ wget http://unc.dl.sourceforge.net/sourceforge/courier/maildrop-1.6.3.tar.bz2
$ rpmbuild -ta courier-imap-2.2.1.tar.bz2
$ rpmbuild -ta maildrop-1.6.3.tar.bz2
$ cd rpmbuild/RPMS/i386
$ su
Password: 

IV. Install and Enable the Courier IMAP and Maildrop Services

# rpm -ivh courier-imap-2.2.1-1.1.i386.rpm maildrop-*
# chkconfig --add courier-imap
# chkconfig courier-imap on
# service courier-imap start

V. Configure Postfix and Integrate it with Postfix

This is a very basic configuration for Postfix to get it running and configured to integrate with Maildrop. The parameters listed
 are the ONLY ones that need to be changed. 

# vi /etc/postfix/main.cf
myhostname = example.com
mydomain = example.com
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, $mydomain
mailbox_command = /usr/bin/maildrop -d "$USER" -f "$SENDER" "$EXTENSION"

# cp /etc/aliases /etc/postfix/aliases
# chkconfig postfix on
# service postfix start
# exit
$

VI. Download and Install SpamAssassin

$ cd $HOME/rpmbuilds/RPMS/i386
$ wget http://eu.spamassassin.org/released/RPMs/perl-Mail-SpamAssassin-2.63-1.i386.rpm
$ wget http://eu.spamassassin.org/released/RPMs/spamassassin-2.63-1.i386.rpm 
$ wget http://eu.spamassassin.org/released/RPMs/spamassassin-tools-2.63-1.i386.rpm
$ su 
# rpm -ivh perl-Mail*
# rpm -ivh spamassassin*
# chkconfig spamassassin on
# service spamassassin start

VII. Integrate Maildrop with SpamAssassin

# vi /etc/maildroprc
import SENDER
import RECIPIENT
SENDMAIL=/usr/sbin/sendmail
DEFAULT="./Maildir"
xfilter "/usr/bin/spamc -f"
# exit

Setup a regular user to receive email. The maildirmake command is part of the Maildrop package. It creates Qmail style mailboxes 
which are traditionally faster than standard Unix mbox formats.

# su - darren
$ maildirmake Maildir
$ maildirmake -f Spam Maildir
$ vi $HOME/.mailfilter
if ( /^X-Spam-Status: Yes/ )
{
  cc "!uce@ftc.gov"
  to "Maildir/.Spam"
}
$ chmod 600 $HOME/.mailfilter

VIII. Integrate SpamAssassin with Anomy Mail Tools

Modify the "Unicode UTF-8" locales in /etc/sysconfig/i18n. There have been numerous issues with Anomy, Perl, and formatting as
 a result. See http://www.linuxmanagers.org/pipermail/linuxmanagers/2002-December/000885.html
for more details.

# vi /etc/sysconfig/i18n
LANG="en_US"
SUPPORTED="en_US:en"
SYSFONT="lat0-sun16"
SYSFONTACM="iso01"

Download Anomy Mail Tools

# cd /usr/local
# wget http://mailtools.anomy.net/dist/anomy-sanitizer-1.66.tar.gz
# gunzip anomy*
# tar xvf anomy*
# vi /etc/maildroprc
import SENDER
import RECIPIENT
SENDMAIL=/usr/sbin/sendmail
DEFAULT="./Maildir"
xfilter "/usr/bin/spamc -f"
ANOMY=/usr/local/anomy/
xfilter "/usr/local/anomy/bin/sanitizer.pl /usr/local/anomy/anomy.conf 2>>~/mailfilter-log.txt | cat"
# cd /usr/local/anomy
# wget http://www.ufsdump.org/scripts/anomy.conf

Download the "subjadd" Utility

# cd /usr/local/anomy/bin
# wget http://www.ufsdump.org/downloads/subjadd.gz
# gunzip subjadd.gz
# su - darren
$ vi .mailfilter
if ( /^X-Spam-Status: Yes/ )
{
  cc "!uce@ftc.gov"
  to "Maildir/.spam"
}
if (   /^*** Attached file dropped ***/:b )
{
  cc "Maildir/.Virus"
  xfilter "/usr/local/anomy/bin/subjadd [Virus-Detected]"
  to "Maildir"
}
$ maildirmake -f Virus Maildir

IX. Install and configure Squirrelmail for Courier IMAP

$ cd $HOME/rpmbuild/RPMS/i386
$ wget http://easynews.dl.sourceforge.net/sourceforge/squirrelmail/squirrelmail-1.4.2-1.noarch.rpm
$ su 
# rpm -Uvh squirrlemail*

# cd /usr/share/squirrelmail/conf
# ./conf.pl

<<snip>

D.  Set pre-defined settings for specific IMAP servers

Command >> D
SquirrelMail Configuration : Read: config.php

<<snip>>

Please select your IMAP server:
    cyrus      = Cyrus IMAP server
    uw         = University of Washington's IMAP server
    exchange   = Microsoft Exchange IMAP server
    courier    = Courier IMAP server
    macosx     = Mac OS X Mailserver
    quit       = Do not change anything
Command >> courier

              imap_server_type = courier
         default_folder_prefix = INBOX.
                  trash_folder = Trash
                   sent_folder = Sent
                  draft_folder = Drafts
            show_prefix_option = false
          default_sub_of_inbox = false
show_contain_subfolders_option = false
            optional_delimiter = .
                 delete_folder = true

Press any key to continue...

<<snip>>

Command >> S

Data saved in config.php
Press enter to continue...

<<snip>>

Command >> q

X. Configure Apache

This is a very basic configuration of an Apache webserver using "name based" virtual hosting. These variables are the ONLY
 ones that need to be changed.

# vi /etc/httpd/conf/httpd.conf
ServerAdmin webmaster@example.com
ServerName 192.168.1.1:80
NameVirtualHost *:80
<VirtualHost *:80>
    ServerAdmin webmaster@example.com
    DocumentRoot /var/www/html/example
    ServerName example.com
    ServerAlias www.example.com
    ErrorLog logs/error_log
    CustomLog logs/access_log common
</VirtualHost>

# mkdir /var/www/html/example
# mkdir /var/www/html/example/logs
# touch /var/www/html/example/logs/access_log
# touch /var/www/html/example/logs/error_log
# chown -R apache:apache /var/www/html/example/logs/

XII. Debug Messages

An approrpiately delivered message should log this entry:

# tail -f /var/log/maillog
Mar 17 21:44:09 asaph postfix/smtpd[30781]: connect from gateway4.stpt.com[216.34.200.41]
Mar 17 21:44:10 asaph postfix/smtpd[30781]: 600E33A7F3: client=gateway4.stpt.com[216.34.200.41]
Mar 17 21:44:10 asaph postfix/cleanup[30783]: 600E33A7F3: message-id=<2050.67.154.138.34.1079588774
.squirrel@216.34.200.29>
Mar 17 21:44:10 asaph postfix/smtpd[30781]: disconnect from gateway4.stpt.com[216.34.200.41]
Mar 17 21:44:10 asaph postfix/nqmgr[30707]: 600E33A7F3: from=<darren.hoch@litemail.org>, size=1009,
 nrcpt=1 (queue active)
Mar 17 21:44:10 asaph spamd[30274]: connection from asaph [127.0.0.1] at port 32906 
Mar 17 21:44:11 asaph spamd[30788]: info: setuid to darren succeeded 
Mar 17 21:44:11 asaph spamd[30788]: Creating default_prefs [/home/darren/.spamassassin/user_prefs] 
Mar 17 21:44:11 asaph spamd[30788]: Created user preferences file: /home/darren/.spamassassin/user_prefs 
Mar 17 21:44:11 asaph spamd[30788]: processing message <2050.67.154.138.34.1079588774.squirrel@216.34.200.41>
for darren:500. 
Mar 17 21:48:26 asaph postfix/local[30814]: B0F7C3B1F7: to=<darren@rh.myhopechapel.net>, relay=local, delay=1,
status=sent ("|/usr/bin/maildrop -d "$USER" -f "$SENDER" "$EXTENSION")