tar zxf MailScanner-4.75.11-1.rpm.tar.gz -C /usr/src/
cd /usr/src/MailScanner-4.75.11-1/
yum install -y rpm-build 
./install.sh
vim /etc/MailScanner/MailScanner.conf
115 Run As User = postfix
120 Run As Group = postfix
149 Incoming Queue Dir = /var/spool/postfix/hold
153 Outgoing Queue Dir = /var/spool/postfix/incoming
180 MTA = postfix
2083 Required SpamAssassin Score = 7
2089 High SpamAssassin Score = 10
2286 Spam Actions = deliver header "X-Spam-Status: Yes"
2347 High Scoring Spam Actions = delete forward [email protected]

 vim /etc/postfix/main.cf
header_checks = regexp:/etc/postfix/header_checks    //加入一行

 vim /etc/postfix/header_checks
/^Received:/    HOLD                           //最后加入

chown -R postfix:postfix /var/spool/MailScanner/incoming/
chown -R postfix:postfix /var/spool/MailScanner/quarantine/

  /etc/init.d/MailScanner start
 chkconfig  --level 35   MailScanner on

配置SpamAssassin/反垃圾功能。
 yum install -y perl-Archive-Tar*  perl-IO-Socket-INET6* perl-IO-Socket-SSL*  perl-Digest-SHA1*  perl-IO-Zlib* perl-Net-DNS* perl-Socket6* perl-Net-SSLeay* perl-Digest-HMAC* 
rpm -ivh  /tmp/postfix/spamassassin-3.1.7-4.el5.i386.rpm
/etc/init.d/spamassassin start
chkconfig spamassassin on

配置F－prot防病毒软件
tar -zxvf fp-Linux-i686-ws.tar.gz -C /usr/src/
 cd /usr/src/f-prot
./install-f-prot.pl
/usr/src/f-prot/fpupdate    //手动更新病毒库，需接入互联网