###################################postfix+mysql#####################################
1.安装
yum reinstall postfix.x86_64 -y
vim /etc/postfix/main.cf
76 myhostname = westos-mail.westos.com ##指定mta主机名称
83 mydomain = westos.com ##指定mta的域名
99 myorigin = westos.com ##指定邮件来源结尾（@后面的字符内容）
116 inet_interfaces = all ##25端口开启的网络接口
164 mydestination = $myhostname, $mydomain, localhost ##接收邮件结尾字符的指定
2，yum install httpd php php-mysql mariadb-server -y
systemctl start mariadb
vim /etc/my.cnf
如图七
systemctl restart mariadb
mysql_secure_installation
3，在/var/www/html/中，下载phpMyadmin-3.4.0-all-languages.tar.bz2
tar jxf phpMyadmin-3.4.0-all-languages.tar.bz2
mv phpMyadmin-3.4.0-all-languages/ myadmin
cd myadmin/
cp config.sample.inc.php config.inc.php
vim config.inc.php
如图八
systemctl restart httpd
应用：
在myadmin软件上，
创建数据库email
在email库中，创建表emailuser
如图九
4，
mysql -uroot -pwestos ###创建postuser并进行授权
如图十
mysql -upostuser -ppostfix ##登录postuser
如图十一
5，
vim /etc/postfix/mialuser.cf ##用户名称查询
hosts = localhost ##数据库所在主机
user = postuser ##登录数据库的用户
password = postfix ##登录数据库的密码
dbname = email ##postfix要查询的库名称
table = emailuser ##postfix要查询的表的名称
select_field = username ##postfix要查询的字段
where_field = username ##用户给定postfix的查询条件
vim /etc/postfix/mialdomain.cf ##用户域名查询
hosts = localhost
user = postuser
password = postfix
dbname = email
table = emailuser
select_field = domian
where_field = domain
vim /etc/postfix/mialbox.cf ##用户邮箱查询
hosts = localhost
user = postuser
password = postfix
dbname = email
table = emailuser
select_field = maildir
where_field = username
6，配置postfix
postmap -q "[email protected]" mysql:/etc/postfix/mailuser.cf
postmap -q "ling.com" mysql:/etc/postfix/maildomain.cf
ling.com
postmap -q "[email protected]" mysql:/etc/postfix/mailbox.cf
/ling.com/ling
groupadd -g 666 vmail
useradd -s /sbin/nologin -u 666 vmail -g 666
postconf -e "virtual_mailbox_base = /home/vmail" ##设定虚拟用户的邮件目录
postconf -e "virtual_uid_maps = static:666" ##虚拟用户建立文件的uid
postconf -e "virtual_gid_maps = static:666" ##虚拟用户建立文件的gid
postconf -e "virtual_alias_maps = mysql:/etc/postfix/mailuser.cf"
postconf -e "virtual_mailbox_domains = mysql:/etc/postfix/maildomain.cf"
postconf -e "virtual_mailbox_maps = mysql:/etc/postfix/mailbox.
cf"
systemctl restart postfix
测试：
在虚拟机中
mail [email protected]
在/home/vmail/ling.com/ling中，查看邮件
如图十二
###################################dovecot+mysql######################
1.安装
yum install dovecot
yum install dovecot-mysql -y ##dovecot软件的插件，让此软件可以识别mysql
2,配置
vim /etc/dovecot/dovecot.conf
24 protocols = imap pop3 lmtp ##支持收件协议
48 login_trusted_networks = 0.0.0.0/0 ##信任网络
49 disable_plaintext_auth = no ##开启明文认证
如图一
vim /etc/dovecot/conf.d/10-auth.conf
123 !include auth-sql.conf.ext ##开启mysql的认证方式
##生成dovecot读取mysql的配置
cp /usr/share/doc/dovecot-2.2.10/example-config/dovecot-sql.conf.ext /etc/dovecot/dovecot-sql.conf.ext
vim /etc/dovecot/dovecot-sql.conf.ext
32 driver = mysql ##数据库的类型
71 connect = host=localhost dbname=email user=postuser password=postuser ##查询时用到的库，用户，密码
78 default_pass_scheme = PLAIN
##默认认证方式为明文
107 password_query = \ ##查询密码匹配
108 SELECT username, domain, password\
109 FROM emailuser WHERE username ='%u' AND domain = '%d'
125 user_query = SELECT maildir, 666 AS uid, 666 AS gid FROM emailuser WHEREuse rname = '%u'
如图二
vim /etc/dovecot/conf.d/10-mail.conf
30 mail_location = maildir:/home/vmail/%d/%n ##指定邮箱位置
168 first_valid_uid = 666 ##邮件文件查询用户身份
175 first_valid_gid = 666
如图
systemctl restart dovecot
3，测试：
yum install telnet -y
telnet 172.25.254.135 110
如图四
###############################邮件空壳##################################
vim /etc/postfix/main.cf
75 myhostname = qq-mail.qq.com
83 mydomain = qq.com
99 myorigin = westos.com ##收件方的域名（以westos.com结尾的主机）
113 inet_interfaces = all
164 mydestination = ##不接受邮件，只转发
316 relayhost = 172.25.254.135 ##转发给ip为172.25.254.135主机
systemctl restart postfix.service
测试：
如图五，六