####dovecot+mysql####
#####################
1.安装
yum install dovecot dovecot-mysql -y ##dovecot-mysql 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
vim /etc/dovecot/conf.d/10-auth.conf
123 !include auth-sql.conf.ext ##开启mysql的认证方式cp /usr/share/doc/dovecot-2.2.10/example-config/dovecot-sql.conf.ext /etc/dovecot/dovecot-sql.conf.ext ##生成dovecot读取mysql的配置
vim /etc/dovecot/dovecot-sql.conf.ext
32 driver = mysql ##数据库类型
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 WHERE username = '%u' ##查询邮件内容
vim /etc/dovecot/conf.d/10-mail.conf
30 mail_location = maildir:/home/vmail/%d/%n ##指定邮件位置168 first_valid_uid = 666 ##邮件文件查询用户身份
175 first_valid_gid = 666
systemctl restart dovecot
3.测试：
yum install telnet -y
Trying 172.25.254.131...
Connected to 172.25.254.131.
Escape character is '^]'.
+OK [XCLIENT] Dovecot ready.
user [email protected]
+OK
pass wang
+OK Logged in.
quit
+OK Logging out.
Connection closed by foreign host.
###############
####空壳邮件####
###############
vim /etc/postfix/main.cf ##编辑配置文件
76 myhostname = nullmail.example.com ##指定mta主机名称
83 mydomain = example.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 = ##不接收任何邮件
316 relayhost = 172.25.254.131 ##指定真实的邮件服务器IP地址
systemctl restart postfix.service
mail [email protected]