|NO.Z.00072|——————————|^^ 部署 ^^|——|Linux&企业邮件.V03|——|client配置|

一、接收方配置：安装dovecot相关软件

### --- 安装dovecot相关软件

[root@server21 ~]# yum install -y dovecot dovecot-devel dovecot-mysql
[root@server21 ~]# chkconfig dovecot on
[root@server21 ~]# service dovecot start

二、配置dovecot能够去数据库里读数据

### --- 配置dovecot能够去数据库里读数据
### --- 修改/etc/dovecot/conf.d/10-mail.conf
~~~     在配置文件中增加下列两行

[root@server21 ~]# vim /etc/dovecot/conf.d/10-mail.conf 
mail_location = maildir:/home/vmail/%d/%n/Maildir           // 定义dovecot查询邮件的位置（顶头写）            
first_valid_uid = 600

### --- 修改/etc/dovecot/conf.d/10-auth.conf

[root@server21 ~]# vim /etc/dovecot/conf.d/10-auth.conf
!include auth-system.conf.ext
!include auth-sql.conf.ext                                  // 取消调用数据库的记录注释

### --- 修改数据库连接配置文件（需要拷贝模板生成）

[root@server21 ~]# cp -a /usr/share/doc/dovecot-2.0.9/example-config/dovecot-sql.conf.ext /etc/dovecot/
[root@server21 ~]# vim /etc/dovecot/dovecot-sql.conf.ext    // 将下列内容加入配置文件即可
driver = mysql      
~~~     驱动类型
connect = host=localhost dbname=extmail user=extmail password=extmail
~~~     连接数据库信息
default_pass_scheme = MD5
password_query = \
SELECT username, domain, password \
FROM mailbox WHERE username = '%u' AND domain = '%d'            
~~~     验证登录密码的查询命令
user_query = SELECT maildir, 600 AS uid, 600 AS gid FROM mailbox WHERE username = '%u'  
~~~     查询虚拟用户对应的邮箱目录

三、重启dovecot验证是否能连接

### --- 重启dovecot验证是否能连接
### --- 安装Telnet客户端进行登录验证

[root@server21 ~]# service dovecot restart
[root@server21 ~]# yum install -y telnet
[root@server21 ~]# netstat -antp        
tcp        0      0 0.0.0.0:110                 0.0.0.0:*                   LISTEN      2962/dovecot 

[root@server21 ~]# telnet mail.extmail.org 110
Trying 20.20.20.21...
Connected to mail.extmail.org.
Escape character is '^]'.
+OK Dovecot ready.                                      // 登录成功；在此基础下执行命令
user postmaster@extmail.org                             // 登录postmaster用户
+OK
pass extmail                                            // 密码是extmail；若是可以连接数据库说明没有问题
+OK Logged in.
retr 1                                                  // 查看第一封邮件
+OK 560 octets
Return-Path: <root@server21.localdomain>
X-Original-To: support@extmail.org
Delivered-To: postmaster@extmail.org
Received: by server21.localdomain (Postfix, from userid 0)
    id 37705480A19; Thu,  4 Feb 2021 09:41:44 +0800 (CST)
Date: Thu, 04 Feb 2021 09:41:44 +0800
To: support@extmail.org
Subject: test
User-Agent: Heirloom mailx 12.4 7/29/08
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20210204014144.37705480A19@server21.localdomain>
From: root@server21.localdomain (root)
hello
.   
quit 
+OK Logging out.                                        // 登出
Connection closed by foreign host.                          

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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