软件包版本
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CentOS 6.5 X64
postfixadmin-2.91.tar.gz
postfix-2.6.6-6.el6_5.i686(yum)
postfix-2.11.1.tar.gz(Traball)
dovecot-2.0.9-7.el6_5.1.i686
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域名及主机名
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Domain：vqiu.cn
Hostname：mail.vqiu.cn
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数据库信息
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MysqL（postfixadmin）

DBNAME ===> postfixadmin
user ===> postfix
password ===> postfixadmin

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1、域名及主机名设置

略……

2、配置新yum 源（网易）
[root@mail ~]#yum -y install wget
[root@mail ~]#cd /etc/yum.repos.d/
[root@mail yum.repos.d]#mkdir backup
[root@mail yum.repos.d]#mv CentOS-* backup/
[root@mail yum.repos.d]#wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
//此步骤可选，目的为今后yum安装amavisd-new、clamav 等
[root@mail ~]#rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
//清空yum缓存及更新系统
[root@mail ~]#yum clean all; yum update -y

3、LAMP 环境
[root@mail ~]#yum -y install httpd MysqL MysqL-devel MysqL-server PHP PHP-pecl-Fileinfo PHP-mcrypt PHP-devel PHP-MysqL PHP-common PHP-mbstring PHP-gd PHP-imap PHP-ldap PHP-odbc PHP-pear PHP-xml PHP-xmlrpc pcre pcre-devel
//配置apache，并让apache支持PHP
[root@mail ~]#vi /etc/httpd/conf/httpd.conf
AddType application/x-httpd-PHP .PHP #添加对PHP程序的支持
PHPIniDir "/etc/PHP.ini" #指定PHP.ini配置文件路径
DirectoryIndex index.PHP index.html#指定首页文件类型
#取消ServerName前的注释，否则启动httpd 时提示276行

4、配置MysqL，为postfixadmin 准备好数据库及认证用户
[root@mail ~]#MysqL -uroot -p
MysqL> create database postfix character set utf8;
MysqL> grant all privileges on postfix.* to postfix@localhost identified by 'postfixadmin';
MysqL> flush privileges;
MysqL> exit

5、添加邮件虚拟用户 vmail
将生成的 函数添加到config.inc.PHP文件末尾中，添加个管理员账号：比如postmaster@vqiu.cn (添加完成后建议将setup.PHP这个文件进行更名，或者直接删除)

在postfixadmin添加vqiu.cn域，以及两个测试用户zhang3、li4.

安装
[root@mail ~]#yum -y install dovecot dovecot-devel dovecot-MysqL
#主要配置
[root@vqiu ~]#dovecot -n
# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.20.3.el6.x86_64 x86_64 CentOS release 6.5 (Final) ext4
auth_mechanisms = plain login cram-md5
dict {
quota = MysqL:/etc/dovecot/dovecot-dict-sql.conf.ext
}
disable_plaintext_auth = no
listen = *
mail_location = maildir:/var/vmail/%d/%n
mBox_write_locks = fcntl
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
plugin {
quota = dict:User quota::proxy::quota
quota_rule = *:storage=1G
}
postmaster_address = postmaster@vqiu.cn
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0666
user = postfix
}
unix_listener auth-client {
group = postfix
mode = 0600
user = postfix
}
unix_listener auth-userdb {
group = vmail
mode = 0600
user = vmail
}
}
service dict {
unix_listener dict {
group = vmail
mode = 0600
user = vmail
}
}
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_key = </etc/pki/dovecot/private/dovecot.pem
userdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
protocol lda {
mail_plugins = quota
}
protocol pop3 {
mail_plugins = quota
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %08Xu%08Xv
}

[root@mail ~]#vi /etc/dovecot/dovecot-dict-sql.conf.ext
connect = host=localhost dbname=postfix user=postfix password=postfixadmin
map {
pattern = priv/quota/storage
table = quota2
username_field = username
value_field = bytes
}
map {
pattern = priv/quota/messages
table = quota2
username_field = username
value_field = messages
}
[root@mail ~]#vi /etc/dovecot/dovecot-sql.conf.ext
driver = MysqL
connect = host=localhost dbname=postfix user=postfix password=postfixadmin
#与postfixadmin 中的要一致，否则出现密码不匹配的现象
default_pass_scheme = CRAM-MD5
user_query = SELECT CONCAT('/var/vmail/',maildir) AS home,2000 AS uid,2000 AS gid,CONCAT('*:bytes=',quota) as quota_rule FROM mailBox WHERE username = '%u' AND active='1'
password_query = SELECT username AS user,password,CONCAT('/var/vmail/',maildir) AS userdb_home,2000 AS userdb_uid,2000 AS userdb_gid,quota) as userdb_quota_rule FROM mailBox WHERE username = '%u' AND active='1'