（十）安装 DB 库文件
＃ rpm -ivh giflib-4.1.3-7.1.el5.1.i386.rpm
＃ rpm -ivh libgdiplus-1.2.5-1.el5.centos.i386.rpm
＃ rpm -ivh mono-core-1.2.4-2.el5.centos.i386.rpm
＃ rpm -ivh dbus-sharp-0.63-8.el5.centos.i386.rpm
＃ rpm -ivh dbus-sharp-devel-0.63-8.el5.centos.i386.rpm
可以简写成rpm -ivh dbus-sharp-*.rpm，这样可以一次性安装两个包
＃ rpm -ivh dbh-1.0.24-5.el5.centos.i386.rpm
＃ rpm -ivh dbh-devel-1.0.24-5.el5.centos.i386.rpm
可以简写成rpm -ivh dbh-*.rpm
＃ rpm -ivh dbus-glib-devel-0.70-5.i386.rpm
（十一）安装 postfix
postfix 需要使用到 pcre 软件包，因此我们需要先安装下面这两个软件包：
＃ rpm -Uvh pcre-6.6-2.el5_1.7.i386.rpm
＃ rpm -Uvh pcre-devel-6.6-2.el5_1.7.i386.rpm
可以简写成rpm -Uvh pcre-*.rpm
＃ /etc/init.d/sendmail stop
＃ chkconfig --level 0123456 sendmail off
＃ tar zxvf postfix-2.4.6.tar.gz
＃ cd postfix-2.4.6
＃ make tidy
＃ /usr/sbin/groupadd postdrop -g 101
＃ /usr/sbin/groupadd postfix -g 102 （如果原来系统中有该用户则不需要再建）
＃ /usr/sbin/useradd -d /var/spool/postfix -s /bin/true -u 100 -g postfix -G postdrop postfix
# make makefiles CCARGS="-DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/local/include/sasl" AUXLIBS="-L/usr/local/lib -lsasl2"
# make -f Makefile.init makefiles \
'CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include/mysql' \
'AUXLIBS=-L/usr/local/mysql/lib/mysql -R/usr/local/mysql/lib/mysql \
-lmysqlclient -lz -lm'
＃ make
＃ make install
按照疯狂老头的写法，不知道为什么，命令无法执行，我参考了Postfix官方网站的写法，将原作者一个整句拆成两个句子，分别执行，就可以顺利往下继续。
===================================
install_root: [/]
tempdir: [/mnt/softs/postfix-2.4.6] /tmp
config_directory: [/etc/postfix]
daemon_directory: [/usr/libexec/postfix]
command_directory: [/usr/sbin]
queue_directory: [/var/spool/postfix]
sendmail_path: [/usr/sbin/sendmail]
newaliases_path: [/usr/bin/newaliases]
mailq_path: [/usr/bin/mailq]
mail_owner: [postfix]
setgid_group: [postdrop]
manpage_directory: [/usr/local/man]
===================================
中间有两个步骤，是问要不要安装一些文档文件的，疯狂老头忽略了，不过没有关系，这两个步骤不论选是还是选否都不影响安装，只是大家安装的时候必须要仔细对照看，切不可一路回车到底
＃ mv /etc/aliases /etc/aliases.old
＃ ln -s /etc/postfix/aliases /etc/aliases
生成别名二进制文件，这个步骤如果忽略，会造成 postfix 效率极低：
＃ echo 'root:
admin@example.com'>>/etc/postfix/aliases
＃ /usr/bin/newaliases
＃ postconf -n > /etc/postfix/main2.cf
＃ mv /etc/postfix/main.cf /etc/postfix/main.cf.old
＃ mv /etc/postfix/main2.cf /etc/postfix/main.cf
＃ chown root.root /var/spool/postfix
＃ chmod 755 /var/spool/postfix
＃ vi /etc/postfix/main.cf
# hostname
mynetworks = 127.0.0.1
myhostname = mail.extmail.org
mydomain = extmai.com
myorigin = $mydomain
mydestination = $mynetworks $myhostname
# banner
mail_name = Postfix - by extmail.org
smtpd_banner = $myhostname ESMTP $mail_name
# response immediately
smtpd_error_sleep_time = 3s
unknown_local_recipient_reject_code = 550
# extmail config here
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_transport = maildrop:
＃ cp /var/www/extsuite/extman/docs/mysql_* /etc/postfix/
（需要将 ExtMail extman 包解压，见下文“CentOS 5.1 下用源码编译安装 ExtMail （第四部分）”；当然亦可以参照下面步骤创建）
编辑 mysql_virtual_alias_maps.cf
＃ vi /etc/postfix/mysql_virtual_alias_maps.cf
内容如下：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = alias
select_field = goto
where_field = address
编辑 mysql_virtual_domains_maps.cf
＃ vi /etc/postfix/mysql_virtual_domains_maps.cf
内容如下：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = domain
select_field = description
where_field = domain
#additional_conditions = and backupmx ='0' and active ='1'
编辑 mysql_virtual_mailbox_maps.cf
＃ vi /etc/postfix/mysql_virtual_mailbox_maps.cf
内容如下：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = mailbox
select_field = maildir
where_field = username
#additional_conditions = and active = '1'
SMTP 认证需要透过 Cyrus-SASL，连接到 authdaemon 获取认证信息，编辑 /etc/postfix/main.cf，增加如下内容：
＃ vi /etc/postfix/main.cf
# smtpd related config
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unauth_destination,
reject_unauth_pipelining,
reject_invalid_hostname,
# SMTP AUTH config here
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
编辑 postfix 的启动脚本：
＃ vi /etc/rc.d/init.d/postfix
内容如下：
===============================================================
#!/bin/sh
#
# postfix Postfix Mail Transfer Agent
#
# chkconfig: 2345 80 30
# description: Postfix is a Mail Transport Agent, which is the program \
# that moves mail from one machine to another.
# processname: master
# pidfile: /var/spool/postfix/pid/master.pid
# config: /etc/postfix/main.cf
# config: /etc/postfix/master.cf
#
# $Revision: 2.4 $
#
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -x /usr/sbin/postfix ] || exit 0
[ -d /etc/postfix ] || exit 0
[ -d /var/spool/postfix ] || exit 0
RETVAL=0
start() {
# Start daemons.
echo -n "Starting postfix: "
/usr/sbin/postfix start 2>/dev/null 1>&2 && success || failure
RETVAL=$?
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/postfix
echo
return $RETVAL
}
stop() {
# Stop daemons.
echo -n "Shutting down postfix: "
/usr/sbin/postfix stop 2>/dev/null 1>&2 && success || failure
RETVAL=$?
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/postfix
echo
return $RETVAL
}
reload() {
echo -n "Reloading postfix: "
/usr/sbin/postfix reload 2>/dev/null 1>&2 && success || failure
RETVAL=$?
echo
return $RETVAL
}
restart() {
stop
start
}
abort() {
/usr/sbin/postfix abort 2>/dev/null 1>&2 && success || failure
return $?
}
flush() {
/usr/sbin/postfix flush 2>/dev/null 1>&2 && success || failure
return $?
}
check() {
/usr/sbin/postfix check 2>/dev/null 1>&2 && success || failure
return $?
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
reload
;;
abort)
abort
;;
flush)
flush
;;
check)
check
;;
status)
status master
;;
condrestart)
# don't use /var/lock/subsys/postfix, check for postfix running directly
daemon_directory=$(postconf -h daemon_directory)
$daemon_directory/master -t 2>/dev/null && : || restart
;;
*)
echo "Usage: postfix {start|stop|restart|reload|abort|flush|check|status|condrestart}"
exit 1
esac
exit $?
===============================================================
＃ chmod 755 /etc/rc.d/init.d/postfix
也可以用chkconfig --add postfix将其加入服务行列
启动 postfix 服务：
＃/etc/rc.d/init.d/postfix start
也可以写成service postfix start
（十二）安装 maildrop
＃ tar jxvf maildrop-2.0.4.tar.bz2
＃ cd maildrop-2.0.4
＃ ln -s /usr/local/courier-authlib/bin/courierauthconfig /usr/bin/courierauthconfig
＃ ./configure \
--enable-sendmail=/usr/sbin/sendmail \
--enable-trusted-users='root vuser' \
--enable-syslog=1 \
--enable-maildirquota \
--enable-maildrop-uid=1000 \
--enable-maildrop-gid=1000 \
--with-trashquota \
--with-dirsync
＃ make
＃ make install
＃ cp /usr/local/bin/maildrop /usr/bin
＃ chmod a+rx /usr/bin/maildrop
＃ maildrop -v （检查信息，如果有 courier-authlib 则表示安装成功）
maildrop 2.0.4 Copyright 1998-2005 Double Precision, Inc.
GDBM extensions enabled.
Courier Authentication Library extension enabled.
Maildir quota extension enabled.
This program is distributed under the terms of the GNU General Public
License. See COPYING for additional information.
新建其配置文件 /etc/maildroprc 文件，首先指定 maildrop 的日志记录位置：
＃ vi /etc/maildroprc
logfile "/var/log/maildrop.log"
＃ touch /var/log/maildrop.log
＃ chown vuser.vgroup /var/log/maildrop.log
＃ chmod a+r /etc/maildroprc
（十三）安装 courier-imap
＃ tar jxvf courier-imap-4.1.3.tar.bz2
＃ cd courier-imap-4.1.3
＃ ./configure \
--prefix=/usr/local/courier-imap \
--with-redhat \
--enable-unicode \
--disable-root-check \
--with-trashquota \
--without-ipv6 COURIERAUTHCONFIG='/usr/local/courier-authlib/bin/courierauthconfig'
＃ make
＃ make install
＃ cp /usr/local/courier-imap/etc/imapd.dist /usr/local/courier-imap/etc/imapd
＃ cp /usr/local/courier-imap/etc/imapd-ssl.dist /usr/local/courier-imap/etc/imapd-ssl
＃ cp /usr/local/courier-imap/etc/pop3d.dist /usr/local/courier-imap/etc/pop3d
＃ cp /usr/local/courier-imap/etc/pop3d-ssl.dist /usr/local/courier-imap/etc/pop3d-ssl
＃ vi /usr/local/courier-imap/etc/pop3d
POP3DSTART=yes
注：如果你想为用户提供 IMAP 服务，可以在 /usr/local/courier-imap/etc/imapd 文件中设置 " IMAPDSTART=YES "。
＃ cp courier-imap.sysvinit /etc/rc.d/init.d/courier-imapd
＃ chmod 755 /etc/rc.d/init.d/courier-imapd
加入自动启动服务队列：
＃ echo "/etc/rc.d/init.d/courier-imapd start" >> /etc/rc.local
也可以写成chkconfig --add courier-imapd
启动服务：
＃ /etc/rc.d/init.d/courier-imapd start
也可以写成 service courier-imapd start
[
本帖最后由 ryuhi 于 2008-2-1 17:05 编辑 ]
