I run Postfix, Amavisd, Spamassassin and ClamAV on I386 machines 
	with Fedora Core 4 though 8 OS)
	(These instructions may be more than needed, but it works for me.)

	
	
Postgrey Requirements:
	Perl >= 5.6.0
	Perl Module Net::Server
	Perl Module IO::Multiplex
	Perl Module BerkeleyDB
	  perl -MCPAN -e shell
	    install Net::Server
	    install IO::Multiplex
	    install BerkeleyDB

	Berkeley DB >= 4.1 (Library)
	  Download BerkeleyDB to temp directory (/usr/local/src/)
	  (wget http://freshmeat.net/redir/berkeleydb/694/url_tgz/db-4.5.20.tar.gz)
	  tar xvfz DB-x.x.x.tar.gz
	  cd DB-x.x.x
	  cd build_unix
	  ../dist/configure
	  make
	  make install

		
Postgrey:
	Download to temp directory (/usr/local/src/)
	tar xvfz postgrey-x.x.tar.gz
	cd postgrey-x-x
	cp postgrey /usr/sbin/
	cp postgrey_whitelist_clients /etc/postfix/
	cp postgrey_whitelist_recipients /etc/postfix/
	
	useradd postgrey (this also creates the group on my machine)
	vi /etc/passwd
	  change postgrey user login to /sbin/nologin
	    mine shows: postgrey:x:12347:12347::/home/postgrey:/sbin/nologin
	
	mkdir /var/spool/postfix/postgrey
	chown postgrey:postgrey /var/spool/postfix/postgrey
	
	I found this startup script and modified it to fit my needs:
	  Place in /etc/init.d/postgrey
    	#!/bin/bash
		#
		# postgrey startup script
		# chkconfig: 2345 80 30
		# description: Postgrey is a greylisting agent for Postfix.
		#
		case "$1" in 
		start)
		# Start Postgrey
		/usr/sbin/postgrey --inet=127.0.0.1:10023 -d --delay=20 \
		--greylist-text="Policy restrictions; try later" \
		--user=postgrey --group=postgrey
		;;
		stop)
		# Stop Postgrey
		killall postgrey
		;;
		*)
		echo "Usage: $0 {start|stop}"
		exit 1
		;;
		esac
	
	chmod u+x,g+x /etc/init.d/postgrey
	
	mkdir /var/run/postgrey/
	chown -R postgrey:postgrey /var/run/postgrey/
	
	vi /etc/postfix/main.cf
	  In smtpd_recipient_restrictions
	    after reject_unauth_destination and permit_mynetworks, before permit (all) add
	      check_policy_service inet:127.0.0.1:10023,

	Start Postgrey:
	/etc/init.d/postgrey start
	
	Set to start at boot:
	chkconfig --add postgrey on
	
	LINUX2
	  This cleans up postfix and restarts the service.
	  
	(You may want to reboot the computer to verify that everything loads correctly.)
		
	tail -f /var/log/maillog to check for errors