电子邮件服务器（2）
新建虚拟用户邮箱所在的目录，并将其权限赋予postfix用户：
[root@mail ~]# mkdir -pv /var/mailbox
mkdir: created directory `/var/mailbox'
[root@mail ~]# chown -R postfix /var/mailbox
接下来重新配置SMTP 认证，编辑 /usr /lib/sasl2/smtpd.conf ，确保其为以下内容：
pwcheck_method: authdaemond
log_level: 3
mech_list:PLAIN LOGIN
authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket
让postfix支持虚拟域和虚拟用户
[root@mail ~]# vim /etc/postfix/main.cf
添加如下内容;
virtual_mailbox_base = /var/mailbox
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_alias_domains =
virtual_alias_maps = mysql:/etc/postfix/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
message_size_limit = 14336000
virtual_mailbox_limit = 20971520
virtual_create_maildirsize = yes
virtual_mailbox_extended = yes
virtual_mailbox_limit_maps=mysql:/etc/postfix/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
使用extman源码目录下docs目录中的extmail.sql和init.sql建立数据库：
[root@mail ~]# tar -zxvf extman-1.1.tar.gz -C /usr/src/
[root@mail ~]# cd /usr/src/extman-1.1/docs/
[root@mail docs]# mysql -u root -p <extmail.sql
Enter password:
[root@mail docs]# mysql -u root -p <init.sql
Enter password:
密码为“redhat”
mysql -u root -p 进行验证
[root@mail docs]# cp mysql* /etc/postfix/
授予用户extmail访问extmail数据库的权限
mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';
mysql> GRANT all privileges on extmail.* TO [email protected] IDENTIFIED BY 'extmail';
mysql>FLUSH PRIVILEGES; 让设置的内容生效
具体操作：
[root@mail docs]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.0.77 Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT all privileges on extmail.* TO [email protected] IDENTIFIED BY 'extmail';
Query OK, 0 rows affected (0.01 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql>
重启postfix
[root@mail docs]# service postfix restart
配置dovecot
[root@mail ~]# vim /etc/dovecot.conf
增加一行：
mail_location = maildir:/var/mailbox/%d/%n/Maildir
796 #passdb pam {
897 #userdb passwd {
870 passdb sql {
#path for SQL configuration file, see doc/dovecot-sql-example.conf
args = /etc/dovecot-mysql.conf
}
933 userdb sql {
#path for SQL configuration file, see doc/dovecot-sql-example.conf
args = /etc/dovecot-mysql.conf
}
[root@mail ~]# vim /etc/postfix/main.cf
416 home_mailbox = Maildir/
编辑新文件dovecot-mysql.conf
[root@mail ~]# vim /etc/dovecot-mysql.conf
添加如下内容：
driver = mysql
connect = host=localhost dbname=extmail user=extmail password=extmail
default_pass_scheme = CRYPT
password_query = SELECT username AS user,password AS password FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, uidnumber AS uid, gidnumber AS gid FROM mailbox WHERE username = '%u'
启动dovecot
[root@mail ~]# service dovecot start
[root@mail ~]# chkconfig dovecot on
七、安装Extmail-1.2 （先安装httpd）
1、安装
[root@mail ~]# tar -zxvf extmail-1.2.tar.gz -C /usr/src/
[root@mail ~]# mkdir -pv /var/www/extsuite
[root@mail ~]# cd /usr/src/
[root@mail src]# mv extmail-1.2 /var/www/extsuite/extmail
[root@mail src]# cp /var/www/extsuite/extmail/webmail.cf.default /var/www/extsuite/extmail/webmail.cf
2、修改主配置文件
[root@mail src]# vim /var/www/extsuite/extmail/webmail.cf
SYS_USER_LANG = en_US
语言选项，可改作：
SYS_USER_LANG = zh_CN
SYS_MAILDIR_BASE = /home/domains
当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
修改为：
SYS_MYSQL_USER = extmail
SYS_MYSQL_PASS = extmail
SYS_AUTHLIB_SOCKET = /var/spool/authdaemon/socket
修改为：
SYS_AUTHLIB_SOCKET = /usr/local/courier-authlib/var/spool/authdaemon/socket
apache相关配置
由于extmail要进行本地邮件的投递操作，故必须将运行apache服务器用户的身份修改为您的邮件投递代理的用户；本例中打开了apache服务器的suexec功能，故使用以下方法来实现虚拟主机运行身份的指定。此例中的MDA为postfix自带，因此将指定为postfix用户：
编辑apache配置文件
[root@mail ~]# vim /etc/httpd/conf/httpd.conf
231 User postfix
232 Group postfix
在最后添加如下内容：
<VirtualHost 192.168.101.200:80>
ServerName mail.abc.com
DocumentRoot /var/www/extsuite/extmail/html/
ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi
Alias /extmail /var/www/extsuite/extmail/html
</VirtualHost>
修改 cgi执行文件属主为apache运行身份用户：
chown -R postfix.postfix /var/www/extsuite/extmail/cgi/
4、依赖关系的解决
extmail将会用到perl的Unix::syslogd功能，您可以去http://search.cpan.org搜索下载原码包进行安装
[root@mail ~]# tar -zxvf Unix-Syslog-1.1.tar.gz -C /usr/src/
[root@mail ~]# cd /usr/src/Unix-Syslog-1.1/
[root@mail Unix-Syslog-1.1]# perl Makefile.PL
[root@mail Unix-Syslog-1.1]# make && make install
启动apache
[root@mail Unix-Syslog-1.1]# service httpd start
[root@mail Unix-Syslog-1.1]# chkconfig httpd on
八、 安装Extman-1.1
1、安装及基本配置
[root@mail ~]# tar -zxvf extman-1.1.tar.gz -C /usr/src/
[root@mail ~]# cd /usr/src/
[root@mail src]# mv extman-1.1 /var/www/extsuite/extman
[root@mail ~]# cp /var/www/extsuite/extman/webman.cf.default /var/www/extsuite/extman/webman.cf
[root@mail ~]# vim /var/www/extsuite/extman/webman.cf
SYS_MAILDIR_BASE = /home/domains
用户邮件的存放目录，可改作：
SYS_MAILDIR_BASE = /var/mailbox
修改
SYS_CAPTCHA_ON = 1
为
SYS_CAPTCHA_ON = 0
修改cgi目录的属主：
[root@mail ~]# chown -R postfix.postfix /var/www/extsuite/extman/cgi/
在apache的主配置文件中Extmail的虚拟主机部分，添加如下两行：
ScriptAlias /extman/cgi /var/www/extsuite/extman/cgi
Alias /extman /var/www/extsuite/extman/html
[root@mail ~]# mkdir -pv /tmp/extman
[root@mail ~]# chown postfix.postfix /tmp/extman
[root@mail ~]#
编辑/etc/postfix/main.cf
注释掉165、166行
重启apache服务
测试：
在浏览器中输入http://mail.abc.com/extmail
