AUTHOR:         Jim Gifford <lfs-hints at jg555.com>

DATE:		2004-03-25

LICENSE: 	GNU Free Documentation License Version 1.2

SYNOPSIS:	How to setup the Extra Capabilities in Courier

DESCRIPTION:	This hint will show you how to use feature of the Courier Mail
		Server that are not mentioned in BLFS

PREREQUISITES:  Courier, Mgetty, Virus Scanner

HINT:

------

Courier Maillist List Manager

	This will show you the process on how to setup Courier's Mailing List.

	Step One : Define the location for the mailling list
		   couriermlm create {directory} {email_address}
		   Example : couriermlm create /home/test-list ADDRESS=testlist@example.com

	Step Two : Create a user entry for this user.
		Method A : Add a user to passwd with the home directory the same as create directory above
		Example : echo "testlist:x:9999:9999:Test Maillist:/home/testlist:/bin/bash" >> /etc/passwd

				
		Method B : Add a user to virutal suers with the home directory the same as created directory above
		Example :  mysql -ucourier -p{password} courier-mail
		           insert into users values ('testlist@example.com','','password',
                                                     'Test Maillist',9999 ,9999,
                                                     '/home/test-list','');

	Step Three : Create .courier in the {directory} with the following information
		| couriermlm msg {directory}
		Example : couriermlm msg /home/test-list
			
	Step Four : Create .courier-default in the {directory} with the following information
		| couriermlm ctlmsg {directory}
		Example : couriermlm ctlmsg /home/test-list
			
	Step Five : Create .courier-owner in the {directory} with the following information
		owner_of_list@example.com
		Example : listmanager@example.com

	Step Six : Create a cron entry that runs every hour with the following information
		couriermlm hourly {directory}
		Example : couriermlm hourly /home/test-list

	Step Seven : Create a cron entry that runs once a day with the following information
		couriermlm daily {directory}
		Example : couriermlm daily /home/test-list
		

	You have now created a maillist list under courier. Now you can send a message to your mailist to subscribe
		Example : testlist-subscribe@example.com

-----

Amavis
	
Prerequisites:	A Virus Scanner

	This will show you how to setup Amavis(Mail Virus Scanner) to work with Courier.

	Before you can install Amavis, you will need to install a virus scanner. The one
	I have been using is Clamav.

	Download location (HTTP):       
	http://osdn.dl.sourceforge.net/sourceforge/clamav/clamav-0.67.tar.gz

	Installation of Clamav
	
        ./configure --prefix=/usr \
                    --sysconfdir=/etc/clamav
	make
	make install

	Now for the installation of Amavis

	Download location (HTTP):       
	http://osdn.dl.sourceforge.net/sourceforge/amavis/amavis-0.3.12.tar.gz
	
	Need Patches
	http://ftp.jg555.com/patches/amavis/amavis-0.3.12-courier-2.patch
	http://ftp.jg555.com/patches/amavis/amavis-0.3.12-maildrop-securityhole-1.patch

	Step One - Install Amavis required perl modules

		perl -MCPAN -e 'install IO::String'
		perl -MCPAN -e 'install Unix::Syslog'
		perl -MCPAN -e 'install Convert::UUlib'
		perl -MCPAN -e 'install Convert::TNEF'
		perl -MCPAN -e 'install Compress::Zlib'
		perl -MCPAN -e 'install Archive::Tar'
		perl -MCPAN -e 'install Archive::Zip'
		perl -MCPAN -e 'install Mail::Address'
		perl -MCPAN -e 'install MIME::Tools'
		perl -MCPAN -e 'install libnet'

	Step Two - Create Amavis Executable
	
	./reconf
	./configure --prefix=/usr \
		    --enable-courier \
		    --enable-syslog \
		    --with-syslog-level=mail.info \
		    --with-amavisuser=amavis	


	Step Three - Configure Courier

		In /etc/courier/courierd

		Change the DEFAULTDELIVERY=./Maildir to DEFAULTDELIVERY="| /usr/bin/maildrop"

		For All users

		In /etc/courier/maildroprc

		Add the following:

		# Virus Scan
		#
		import SENDER
		import RECIPIENT

		if ($SENDER ne "")
			{
				FROM=escape($SENDER)
			}
			else
			{
				FROM="unknown@example.com"
			}

		if ($RECIPIENT ne "")
			{
				TO=escape($RECIPIENT)
			}
			else
			{
				TO="unknown@jg555.com"
			}

		xfilter "/usr/sbin/amavis $SENDER $RECIPIENT"

		# Drop anything listed as a Virus into .Virus
		#
		if (/^Subject:.*VIRUS FROM*/)
			to "$DEFAULT/.Virus/"

		# Drop anything listed as a Virus into .Virus
		#
		if (/^Subject:.*VIRUS TO*/)
			to "$DEFAULT/.Virus/"

		For Individual Users

		Create the same information as above only as .mailfilter in the users
		home directory.

-----

Mailing List Filtering

	This will show you how to filter Mailing Lists that you subscribe to into different
	IMAP folders.

	Step One

		Go to the Maildir in the users home directory. maildirmake .{list_name}.
		
		Example : maildirmake .lfs-dev

	Step Two

		Make sure the newly created .{listname} has the proper user permission.
		chown {user:user} .{listname} -R

		Example chown jim:jim .lfs-dev -R

	Step Three

		Edit .mailfilter in the users home directory. Add the following information to
		.mailfilter.

		# {list_name}
		#
		if (/^List-Post:.*{list_address@*/)
		        to "$DEFAULT/.{list_name}/"

		You will have to view the headers of the mail from the list server to find a 
		match criteria you can use. List-Post,list-post,List-ID, and To are the most common
		match cirteria's to use. 

		# lfs-dev
		#
		if (/^List-Id:.*lfs-dev.linuxfromscratch.org*/)
			to "$DEFAULT/.lfs-dev/"

----

Courier Fax

	This will show you how to setup Faxing within Courier.

	Step One - If mgetty is not installed, follow the mgetty hint.
		Hint Link : http://www.linuxfromscratch.org/hints/downloads/files/mgetty.txt

	Step Two - Locate Faxq-helper

		Find Mgetty's faxq-helper program and Change into the directory that it is
		located in.

		How to Locate : find / -name faxq-helper
		Sample Output : /usr/lib/mgetty+sendfax/faxq-helper
		Sample cd     : cd /usr/lib/mgetty+sendfax

	Step Three - Create a symlink for new_fax

		ln -sf /usr/share/courier/new_fax

	How to Use
		
		Send an email to {phone_number}@fax, this will fax to the phone number specified.

		Note: This does not work with Outlook Express

-----

Courier Filter

	This will show you how to use the Courier::Filter framework with Courier.

	Step One - Install Courier Filter required perl modules

		perl -MCPAN -e 'install Net::RBLClient'
		perl -MCPAN -e 'install Digest::MD5'
		perl -MCPAN -e 'install MIME::Tools'
		perl -MCPAN -e 'install Mail::SPF::Query'

	Step Two - Install Courier Filter

		perl -MCPAN -e 'install Courier::Filter'

	Step Three - Create pureperlfilter.conf

		You can retrieve a sample perlpurefilter.conf from 

		http://www.linuxfromscratch.org/hints/downloads/attachments/courier-extras/pureperlfilter.conf

	Step Four - Edit /usr/lib/perl5/site_perl/{perl_version}/Courier/Config.PM
		
		Change 

		use constant COURIER_RUNTIME_DIR    => '/var/run/courier';  # Normally '/var/run/courier'.

		to

		use constant COURIER_RUNTIME_DIR    => '/var/lib/courier';  # Normally '/var/run/courier'.

	Step Five - Create a symlink to pureperlfilter

		ln -s /usr/bin/pureperlfilter /etc/courier/filters/active/

	Step Six - Start the filter

		/etc/rc.d/init.d/courier restart

-----

Dupfilter

	This will show you how to prevent duplicate messages from coming into Courier.
	This is not a 100% fool proof solution, but it does work.

	Step One - Start the Dupfilter

		courierfilter start dupfilter
			
			
-----	

Spamassassin

	This will show you how to scan for SPAM site wide using Spamassassin with courier. 
	This works with virtual users but not virtual domains. Virtual domains require an
	additional module available at http://da.andaka.org/Doku/courier-spamassassin.html.

	Step One - Install Spamassassin

		perl -MCPAN -e shell                    [as root]
		o conf prerequisites_policy ask
		install Mail::SpamAssassin
		quit

	
	Step Two - Creating a Spam User and Group

		You will need to change ### to a userid.

		echo "spam:x:###:###:Spam Assassin Server:/home/spam:/bin/bash" >> /etc/passwd
		echo "spam:x:###:" >> /etc/group
		mkdir /home/spam

	Step Three - Create an init.d script for spamassassin

	# Start /etc/rc.d/init.d/spamd
	#!/bin/bash

	# SpamAssassin

	source /etc/sysconfig/rc
	source $rc_functions

	if [ -f /etc/sysconfig/spamd ]
		then
			source /etc/sysconfig/spamd
	fi


	case "$1" in
		start)
			echo "Starting Spam Assassin Service..."
			loadproc spamd $OPTIONS
			;;

		stop)
			echo "Stopping Spam Assassin Service..."
			killproc spamd
			;;

		restart)
			$0 stop
			sleep 1
			$0 start
			;;

		status)
			statusproc spamd
			;;

		*)
			echo "Usage: $0 {start|stop|restart|status}"
			exit 1
			;;
	esac
	# End /etc/rc.d/init.d/spamd
	
	Step Four - Create an /etc/sysconfig/spamd for spamassassin

	# Start /etc/sysconfig/spamd

	OPTIONS="-d -c -a -q -x -u spam"

	# End /etc/sysconfig/spamd

	Step Five - Make Spamassassin start just before your Mail Server

	cd /etc/rc.d/init.d &&
	ln -sf ../init.d/spamd ../rc0.d/K26spamd &&
	ln -sf ../init.d/spamd ../rc1.d/K26spamd &&
	ln -sf ../init.d/spamd ../rc2.d/K26spamd &&
	ln -sf ../init.d/spamd ../rc3.d/S34spamd &&
	ln -sf ../init.d/spamd ../rc4.d/S34spamd &&
	ln -sf ../init.d/spamd ../rc5.d/S34spamd &&
	ln -sf ../init.d/spamd ../rc6.d/K26spamd

Other Spamassassin Configuration

	White Listing

	In directory /etc/mail/spamassassin there is a file named local.cf, this contains all
	the configuration information for your Spam Assassin Configuration. You will need to
	add the following lines for your internal mail not be to scanned.

	whitelist_from  *@example.com

	If you subscribe to mailling lists, you may want to add the mailling lists in like the
	following.

	whitelist_to    spamassassin-users@incubator.apache.org
	whitelist_from	spamassassin-users@incubator.apache.org

	More Rules

	You can add other rules into the /etc/mail/spamassassin directory. All you have to do
	is either create them or download them. Here is a good one to add for those stupid
	buy drugs online stuff.

	Download antidrug.cf from http://mywebpages.comcast.net/mkettler/sa/antidrug.cf

	Put the file into /etc/mail/spamassassin and issue the following command
	/etc/rc.d/init.d/spamd restart

	Where can I get more rules

	You can get more rules from the links below. 

	Note: Check you syslog for message about errors.  
	If you see an error message, it will tell you what file is having the problem.
	You can either fix it or remove that rule set.

	Example Error Message : 
	Subroutine J_CHICKENPOX_65_body_test redefined at /etc/mail/spamassassin/chickenpox.cf

	Rules Links

	http://www.merchantsoverseas.com/wwwroot/gorilla/sa_rules.htm
	http://wiki.apache.org/spamassassin/CustomRulesets

-----

VERSION: 	1.1

CHANGELOG: 	1.1 Forgot attachment
		1.0 Initial Version

 New Version of this document can be viewed from http://cvs.jg555.com/viewcvs.cgi/lfs-hints