7、安装 postfix
[root @ test root] # groupadd -g 2525 postfix
[root @ test root] # useradd -g postfix -u 2525 -s /sbin/nologin -M postfix
[root @ test root] # groupadd -g 2526 postdrop
[root @ test root] # useradd -g postdrop -u 2526 -s /bin/false -M postdrop
[root @ test root] # service sendmail stop
[root @ test root] # mv /usr/sbin/sendmail /usr/sbin/sendmail.OFF
[root @ test root] # mv /usr/bin/mailq /usr/bin/mailq.OFF
[root @ test root] # mv /usr/bin/newaliases /usr/bin/newaliases.OFF
[root @ test root] # tar zxvf postfix-2.4.5.tar.gz
[root @ test root] #cd postfix-2.4.5
[root @ test postfix-2.4.5] # make makefiles 'CCARGS=-DHAS_MYSQL
-I/usr/local/mysql/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL
-I/usr/local/sasl2/include/sasl
-I/usr/local/BerkeleyDB/include -DUSE_TLS
-I/usr/local/ssl/include/openssl '
'AUXLIBS=-L/usr/local/mysql/lib/mysql -lmysqlclient -lz -lm
-L/usr/local/sasl2/lib -lsasl2 -L/usr/local/BerkeleyDB/lib
-L/usr/local/ssl/lib -lssl -lcrypto'
[root @ test postfix-2.4.5] # make
//**************************** 注 意 ***********************************
注意：在编译时出现如下错误：
这是由于 postfix 找不到 mysql 的头文件所致，解决方法：
[root @test postfix-2.4.5] # mkdir /usr/local/mysql/include/mysql
[root @test postfix-2.4.5] # ln –s /usr/local/mysql/include/* /usr/local/mysql/include/mysql
[root @ test postfix-2.4.5] # chown –R mysql.mysql /usr/local/mysql/include/mysql
3、 出现如下错误：
这是由于 postfix 找不到 mysql 的库文件引起，解决方法：
[root @test ~] # mkdir /usr/local/mysql/lib/mysql
[root @test ~] # ln –s /usr/local/mysql/lib/* /usr/local/mysql/lib/mysql
[root @test ~] # chown –R mysql.msyql /usr/local/mysql/lib/mysql
*******************************************************************\\\\\
[root @ test postfix-2.4.5] # make install
Install_root: [/]
tempdir: [/root/ postfix-2.4.5]
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]
html_directory: [no]
manpages: [/usr/local/man]
readme_directory: [no]
上面的选项全部保持默认，直接回车即可。
/////************************* 注 意 ***********************************
在这一步如果出现在：
tempdir: [/root/ postfix-2.4.5]
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]
html_directory: [no]
manpages: [/usr/local/man]
readme_directory: [no]
在 [ ] 没有内容显示的情况下，那么请注意看 postfix 的报错，如下图所示
如图中红色框选处所示， postfix 提示在在加载共享库文件 libssl.so.0.9.8
时，发生错误，错误的原因是没有此文件，此时你就在系统中找一下，是否存在此文件啦，如果没有的话，就要安装啦，这个库文件与 openssl
有关。本例中此文件存放于 /usr/local/ssl/lib/ 目录下，这里需要将此目录写入到 /etc/ld.so.conf
文件中，然后运行 ldconfig 命令加载。步骤如下：
[root @test ~] # echo “/usr/local/ssl/lib” >> /etc/ld.so.conf
[root @test ~] # ldconfig
********************************************************************\\\\\\
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：
[root @ test postfix-2.4.5] # newaliases
配置 postfix
[root @ test postfix-2.4.5] # vi /etc/postfix/main.cf
myhostname = mail.test.com
mydomain = test.com
myorigin = $mydomain
inet_interfaces = all
mynetworks = 192.168.98.0/24, 127.0.0.0/8
#================Virtual Setting ====================
virtual_mailbox_base = /var/mailbox/
virtual_mailbox_maps= mysql:/etc/postfix/mysql/mysql_virtual_mailbox_maps.cf
virtual_mailbox_domains=mysql:/etc/postfix/mysql/mysql_virtual_domains_maps.cf
virtual_alias_domains =
virtual_alias_maps = mysql:/etc/postfix/mysql/mysql_virtual_alias_maps.cf
virtual_uid_maps = static:2525
virtual_gid_maps = static:2525
virtual_transport = virtual
maildrop_destination_recipient_limit = 1
maildrop_destination_concurrency_limit = 1
#=================Quota Setting ====================
message_size_limit = 14336000
virtual_mailbox_limit = 20971520
virtual_create_maildirsize = yes
virtual_mailbox_extended = yes
virtual_mailbox_limit_maps = mysql:/etc/postfix/mysql/mysql_virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = Sorry,the user's maildir has overdrawn
his diskspace quota,please Tidy your mailbox and try again later.
virtual_overquota_bounce = yes
#=================== Cyrus-sasl=====================
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_invalid_hostname,reject_non_fqdn_hostname,
reject_unknown_sender_domain,reject_non_fqdn_sender,
reject_non_fqdn_recipient,reject_unknown_recipient_domain,
reject_unauth_pipelining, reject_unauth_destination, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_application_name = smtpd
smtpd_banner = Welcome to our $myhostname ESMTP, Warning:Version not Available!
[root @ test postfix-2.4.5] # mkdir -p /etc/postfix/mysql
[root @ test postfix-2.4.5] # cd /etc/postfix/mysql
[root @ test mysql] # vi mysql_virtual_alias_maps.cf
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = alias
select_field = goto
where_field = address
[root @ test mysql] # vi mysql_virtual_mailbox_limit_maps.cf
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = mailbox
select_field = quota
where_field = username
[root @ test mysql] # vi mysql_virtual_domains_maps.cf
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = domain
select_field = description
where_field = domain
[root @ test mysql] # vi mysql_virtual_mailbox_maps.cf
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = mailbox
select_field = maildir
where_field = username
8、安装 courier-authlib
[root @ test root] # tar jxvf courier-authlib-0.58.tar.bz2
[root @ test root] # cd courier-authlib-0.58
[root @ test courier-authlib-0.58] # ./configure
--prefix=/usr/local/courier-authlib --without-authpam
--without-authldap --without-authpwd —without-authshadow
--without-authvchkpw --without-authpgsql
–with-authmysql —with-mysql-libs=/usr/local/mysql/lib/mysql
—with-mysql-includes=/usr/local/mysql/include/mysql —with-redhat
CFLAGS="-march=i686 -O2 -fexpensive-optimizations" \
CXXFLAGS="-march=i686 -O2 -fexpensive-optimizations"
////**************************** 注 意 *****************************
注：如在此步中出现以下错误：
这是由于 courier-atuhlib 默认是从 /usr/lib 寻找 mysql 的库文件
解决方法：将 –with-authmysql 后面设置参数,例：--with-authmysql=/usr/local/mysql/lib/mysql
*************************************************************\\\\\\\\\\\\
[root @ test courier-authlib-0.58] # make
[root @ test courier-authlib-0.58] # make install
[root @ test courier-authlib-0.58] # chmod 755 /usr/local/courier-authlib/var/spool/authdaemon
[root @ test courier-authlib-0.58] # cp
/usr/local/courier-authlib/etc/authlib/authdaemonrc.dist /usr/local/courier-authlib/etc/authlib/authdaemonrc
[root @ test courier-authlib-0.58] # cp
/usr/local/courier-authlib/etc/authlib/authmysqlrc.dist /usr/local/courier-authlib/etc/authlib/authmysqlrc
修改authdaemonrc 文件
[root @ test courier-authlib-0.58] # vi /usr/local/courier-authlib/etc/authlib/authdaemonrc
authmodulelist="authmysql"
authmodulelistorig="authmysql"
daemons=10
编辑authmysqlrc 为以下内容，其中2525，2525 为postfix 用户的UID和GID。
[root @ test courier-authlib-0.58] # vi /usr/localcourier-authlib/etc/authlib/authmysqlrc
MYSQL_SERVER localhost
MYSQL_PORT 3306 (指定你的mysql监听的端口，这里使用默认的3306)
MYSQL_USERNAME extmail (这时为后文要用的数据库的所有者的用户名)
MYSQL_PASSWORD extmail (密码)
MYSQL_SOCKET /tmp/mysql.sock
MYSQL_DATABASE extmail
MYSQL_USER_TABLE mailbox
MYSQL_CRYPT_PWFIELD password
MYSQL_UID_FIELD '2525'
MYSQL_GID_FIELD '2525'
MYSQL_LOGIN_FIELD username
MYSQL_HOME_FIELD concat('/var/mailbox/',homedir)
MYSQL_NAME_FIELD name
MYSQL_MAILDIR_FIELD concat('/var/mailbox/',maildir)
注：这个文件中不能出现空格，或者会出现 FAQ 中的示例4 中的错误。
设置 courier-authlib 自启动
[root @ test courier-authlib-0.58] # cp courier-authlib.sysvinit /etc/init.d/courier-authlib
[root @ test courier-authlib-0.58] # chmod 755 /etc/init.d/courier-authlib
[root @ test courier-authlib-0.58] # chkconfig —add courier-authlib
[root @ test courier-authlib-0.58] # chkconfig —level 2345 courier-authlib on
[root @ test courier-authlib-0.58] #echo "/usr/local/courier-authlib/lib/courier-authlib" >> /etc/ld.so.conf
[root @ test courier-authlib-0.58] # ldconfig
[root @ test courier-authlib-0.58] # service courier-authlib start (启动服务)
9、安装Courier-IMAP
[root @ test root] # tar jxvf courier-imap-4.1.3.tar.bz2
[root @ test root] # cd courier-imap-4.1.3
[root @ test courier-imap-4.1.3] #./configure
—prefix=/usr/local/imap —with-redhat —enable-unicode
—disable-root-check —with-trashquota
CPPFLAGS='-I/usr/local/ssl/include/openssl -I/usr/local/courier-authlib/include'
LDFLAGS='-L/usr/local/courier-authlib/lib/courier-authlib'
COURIERAUTHCONFIG='/usr/local/courier-authlib/bin/courierauthconfig'
[root @ test courier-imap-4.1.3] # make
/////***************************** 注 意 *****************************
如果在这一步出现以下错误不：
因为编译安装的openssl的头文件链接指定问题。默认情况下，courier-imap编译时到/usr/include下查找openssl的头文
件，到/usr/lib 下查找 openssl 的库文件，这里你要查找在这两个目录下是否存在 openssl 的库文件与头文件，openssl
的头文件是 /usr/include/openssl 该文件是链接到 /urs/local/ssl/include/openssl
。openssl的库文件是 /usr/lib/libssl.so 该文件是链接到
/usr/local/ssl/lib/libssl.so.0.9.8 。如没有的，请自行链接，如下：
[root @test ~] # ln –s /usr/local/ssl/include/openssl /urs/include/openssl
[root @test ~] # ln –s /usr/local/ssl/lib/libssl.so.0.9.8 /usr/lib/libssl.so
*********************************************************\\\\\\\
[root @ test courier-imap-4.1.3] # make install
[root @ test courier-imap-4.1.3] # cp /usr/local/imap/etc/imapd.dist /usr/local/imap/etc/imapd
[root @ test courier-imap-4.1.3] # cp /usr/local/imap/etc/imapd-ssl.dist /usr/local/imap/etc/imapd-ssl
[root @ test courier-imap-4.1.3] # cp /usr/local/imap/etc/pop3d.dist /usr/local/imap/etc/pop3d
[root @ test courier-imap-4.1.3] # cp /usr/local/imap/etc/pop3d-ssl.dist /usr/local/map/etc/pop3d-ssl
配置Courier-IMAP，为用户提供pop3服务：
[root @ test courier-imap-4.1.3] # vi /usr/local/imap/etc/pop3d
POP3DSTART=YES
注：如果你想为用户提供IMAP服务，则需在"/usr/local/courier-imap/etc/imapd"文件中设置"IMAPDSTART=yes"；其它类同；
新建虚拟用户邮箱所在的目录，并将其权限赋予postfix用户：
[root @ test courier-imap-4.1.3] # mkdir –p /var/mailbox
[root @ test courier-imap-4.1.3] #chown –R postfix /var/mailbox
[root @ test courier-imap-4.1.3] # cp courier-imap.sysvinit /etc/rc.d/init.d/imapd
[root @ test courier-imap-4.1.3] # chmod 755 /etc/rc.d/init.d/imapd
[root @ test courier-imap-4.1.3] # chkconfig —add imapd
[root @ test courier-imap-4.1.3] # chkconfig —level 2345 imapd on
[root @ test courier-imap-4.1.3] # service imapd start
接下来重新配置SMTP 认证，编辑 /usr/local/lib/sasl2/smtpd.conf ，确保其为以下内容：
[root @ test courier-imap-4.1.3] # vi /usr/local/lib/sasl2/smtpd.conf
pwcheck_method: authdaemond
log_level: 3
mech_list:PLAIN LOGIN
authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket
10、安装 extmail
[root @test root] # tar zxvf extmail-1.0.2.tar.gz
[root @test root] # mkdir -pv /var/www/extsuite
[root @test root] # mv extmail-1.0.2 /var/www/extsuite/extmail
[root @test root]# cp /var/www/extsuite/extmail/webmail.cf.default /var/www/extsuite/extmail/webmail.cf
修改主配置文件
[root @test root] # vi /var/www/extsuite/extmail/webmail.cf
部分修改选项的说明：
SYS_MESSAGE_SIZE_LIMIT = 5242880
用户可以发送的最大邮件
SYS_USER_LANG = en_US
语言选项，可改作：
SYS_USER_LANG = zh_CN
SYS_MAILDIR_BASE = /home/domains
此处即为您在前文所设置的用户邮件的存放目录，可改作：
SYS_MAILDIR_BASE = /var/mailbox/
SYS_MYSQL_USER = db_user
SYS_MYSQL_PASS = db_pass
以上两句句用来设置连接数据库服务器所使用用户名、密码和邮件服务器用到的数据库，这里修改为：
SYS_MYSQL_USER = extmail
SYS_MYSQL_PASS = extmail
SYS_MYSQL_HOST = localhost
指明数据库服务器主机名，这里默认即可
SYS_MYSQL_SOCKET = /var/lib/mysql/mysql.sock
连接数据库的sock文件位置，这里修改为：
SYS_MYSQL_SOCKET = /tmp/mysql.sock
SYS_MYSQL_TABLE = mailbox
SYS_MYSQL_ATTR_USERNAME = username
SYS_MYSQL_ATTR_DOMAIN = domain
SYS_MYSQL_ATTR_PASSWD = password
以上用来指定验正用户登录里所用到的表，以及用户名、域名和用户密码分别对应的表中列的名称；这里默认即可
SYS_AUTHLIB_SOCKET = /var/spool/authdaemon/socket
此句用来指明authdaemo socket文件的位置，这里修改为：
SYS_AUTHLIB_SOCKET = /usr/local/courier-authlib/var/spool/authdaemon/socket
apache相关配置
[root @test root] # vi /usr/local/apache/conf/httpd.conf
将 User daemon
Group daemon
改为
User postfix
Group postfix
将Include conf/extra/httpd-vhosts.conf
前的注释去掉，打开 apache 的虚拟主机功能。
# virtual hosts
Include conf/extra/httpd-vhosts.conf
编辑虚拟主机配置文件
[root @test root]# vi /usr/local/apache/conf/extra/httpd-vhosts.conf
ServerName mail.test.com
DocumentRoot /var/www/extsuite/extmail/html/
ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi
Alias /extmail /var/www/extsuite/extmail/html
依赖关系的解决
extmail将会用到perl的DBD::Mysql和Unix::syslogd功能，您可以去搜索下载原码包进行安装。
[root @ test root] # tar zxvf Unix-Syslog-0.100.tar.gz
[root @ test root] # cd Unix-Syslog-0.100
[root @ test Unix-Syslog-0.100] # perl Makefile.PL
[root @ test Unix-Syslog-0.100] # make
[root @ test Unix-Syslog-0.100] # make install
DBD-Mysql目前最新的版本为DBD-mysql-4.005，但它和系统中的perl结合使用时会造成extmail无法正常使用，因此我们采用3的版本：
[root @ test root] # tar zxvf DBD-mysql-3.0002_4.tar.gz
[root @ test root] # cd DBD-mysql-3.0002_4
[root @ test DBD-mysql-3.0002_4] # perl Makefile.PL (此步骤中如果出现类同Can't
exec "mysql_config": No such file or directory at Makefile.PL line
76.的错误是因为您的mysql的bin目录没有输出至$PATH环境变量)
[root @ test DBD-mysql-3.0002_4] # make
//////************************** 注 意 *******************************
如编译时出现如下错误：
这是由于 DBD-mysql 默认是从 /usr/lib/mysql 查找 mysql 的库文件，而我们的 mysql 的库文件是存放在 /usr/local/mysql/lib/mysql 目录下，解决方法：
[root @test ~] # mv /usr/llib/mysql /usr/lib/mysql.bak
[root @test ~] # mkdir /usr/lib/mysql
[root @test ~] # ln –s /usr/local/mysql/lib/* /usr/lib/mysql
***********************************************************\\\\\\\\\\\\\\\\\\\
[root @ test DBD-mysql-3.0002_4] # make install
好了，到此为止，您的Webmail已经可以使用了，可以在浏览器中输入指定的虚拟主机的名称进行访问，如下：
注：要在 DNS 服务器已经配置好，并运行正常的情况下才可以用域名访问，如果没有配置 DNS 服务，直接输入 IP 就行了
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