构建简单电子邮件系统

Postfix：提供邮件发送服务（SMTP） 

Dovecot：提供邮件收取服务（POP3）

Foxmail：用于收发信的客户端工具

 

#配置好本地DNS服务器

#修改主机名

[root@mail ~]# vim /etc/sysconfig/network

[root@mail ~]# cat /etc/sysconfig/networkNETWORKING=yesHOSTNAME=mail.sxkj.com

#修改hosts文件

[root@mail ~]# vim /etc/hosts[root@mail ~]# cat /etc/hosts10.0.1.88   mail  mail.sxkj.com::1         mail  mail.sxkj.com [root@mail ~]# hostname mail.sxkj.com 

#修改DNS配置文件

[root@mail postfix]# cp -a /var/named/163.com.zone  /var/named/sxkj.com.zone[root@mail postfix]# vim /var/named/sxkj.com.zone[root@mail postfix]# cat /var/named/sxkj.com.zone$TTL 1D@       IN      SOA     mail.sxkj.com. root  (3 ; serial1D ; refresh1H ; retry1W ; expire3H ) ; minimum@       IN      NS      mail.sxkj.com.@       IN      A       10.0.1.88www     IN      A       10.0.1.88mail    IN      A       10.0.1.88@       IN      MX     5      mail.sxkj.com.

#重启DNS服务

[root@mail postfix]# service named restart

Stopping named: .                                          [  OK  ]Starting named:                                            [  OK  ]

 

#安装Postfix

#停用sendmail服务，以避免冲突[root@mail ~]# yum install postfix -y

[root@mail ~]# alternatives --config mtaThere is 1 program that provides 'mta'.Selection    Command-----------------------------------------------*+ 1           /usr/sbin/sendmail.postfixEnter to keep the current selection[+], or type selection number: 1

#重启postfix服务

[root@mail ~]# service postfix restartShutting down postfix:                                     [  OK  ]Starting postfix:                                          [  OK  ]

#开机启动，查看25号端口是否开启

[root@mail ~]# chkconfig  postfix on[root@mail ~]# netstat -ntpl | grep 25tcp     0   0 127.0.0.1:25        0.0.0.0:*           LISTEN      19481/mastertcp     0   0 ::1:25              :::*                LISTEN      19481/master

#修改配置文件main.cf

[root@mail ~]# cd /etc/postfix/[root@mail postfix]# postconf -n >main.cf.new[root@mail postfix]# mv main.cf main.cf.old[root@mail postfix]# mv main.cf.new main.cf[root@mail postfix]# vim main.cf[root@mail postfix]# tail -5 main.cf

#修改以下选项

inet_protocols = all

inet_protocols = ipv4

#添加以下选项myorigin = $mydomainmyhostname = mail.sxkj.commydomain = sxkj.comhome_mailbox = Maildir/mydestination = $mydomain,$myhostname, localhost.$mydomain, localhostmynetworks = 127.0.0.1

#添加本地用户

[root@mail ~]# useradd user1[root@mail ~]# useradd user2[root@mail ~]# passwd user1[root@mail ~]# passwd user2

#telnet进行测试

[root@mail ~]# yum install telnet -y[root@mail ~]# telnet 10.0.1.88 25Trying 10.0.1.88...Connected to 10.0.1.88.Escape character is '^]'.220 mail.sxkj.com ESMTP Postfixmail from:user1250 2.1.0 Okrcpt to:user2250 2.1.5 Okdata354 End data with 
     
      
       .
       
        
         subject:user1 to user21111111111111.250 2.0.0 Ok: queued as 74A69C1766quit221 2.0.0 ByeConnection closed by foreign host.
        
       
      
     

#查看是否收到成功收到邮件

[root@mail ~]# cat /home/user2/Maildir/new/1376117066.Vfd00I63167M572286.mail.sxkj.comReturn-Path: 
     
      X-Original-To: user2Delivered-To: user2@sxkj.comReceived: from mail (mail [10.0.1.88])by mail.sxkj.com (Postfix) with SMTP id 8E04DC4C1Afor 
      
       ; Sat, 10 Aug 2013 14:43:55 +0800 (CST)subject:user1 to user2Message-Id: <20130810064402.8E04DC4C1A@mail.sxkj.com>Date: Sat, 10 Aug 2013 14:43:55 +0800 (CST)From: user1@sxkj.comTo: undisclosed-recipients:;1111111111111
      
     

#yum安装dovecot软件

[root@mail ~]# yum install dovecot -y

#修改配置文件

[root@mail ~]# vim /etc/dovecot/dovecot.conf[root@mail ~]# tail -5 /etc/dovecot/dovecot.conflisten = *ssl_disable = yesprotocols = pop3 imapdisable_plaintext_auth = nomail_location = maildir:~/Maildir

#POP3收信测试：telnet  localhost  110

[root@mail ~]# telnet  mail  110

Trying ::1...

telnet: connect to address ::1: Connection refusedTrying 10.0.1.88...Connected to mail.Escape character is '^]'.+OK Dovecot ready.USER user1+OKPASS 123+OK Logged in.LIST+OK 1 messages:1 518.RETR 1+OK 518 octetsReturn-Path: <>X-Original-To: user1Delivered-To: Received: by mail.sxkj.com (Postfix, from userid 0) id 0C3E4C1766; Sat, 10 Aug 2013 14:37:14 +0800 (CST)Date: Sat, 10 Aug 2013 14:37:14 +0800To: Subject: root to user1User-Agent: Heirloom mailx 12.4 7/29/08MIME-Version: 1.0Content-Type: text/plain; charset=us-asciiContent-Transfer-Encoding: 7bitMessage-Id: <>From:  (root)

222222222222222222222

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#源码安装squirrelmail程序套件[root@mail ~]# tar xf squirrelmail-1.4.18.tar.gz [root@mail ~]# mv squirrelmail-1.4.18 /var/www/html/webmail[root@mail ~]# cd /var/www/html/webmail/[root@mail webmail]# tar xf zh_CN-1.4.18-20090526.tar.gz [root@mail webmail]# chown apache:apache data/[root@mail webmail]# cp config/config_default.php config/config.php[root@mail webmail]# vim config/config.php 

$squirrelmail_default_language = 'zh_CN';

$default_charset = 'zh_CN.UTF-8';$domain = 'sxkj.com';$data_dir = '/var/www/html/webmail/data/';$p_w_upload_dir = '/var/www/html/webmail/attach/';

[root@mail ~]# vim /etc/httpd/conf.d/vhost.conf 

[root@mail ~]# tail -4 /etc/httpd/conf.d/vhost.conf <VirtualHost 10.0.1.88:80>    DocumentRoot /var/local/squirrelmail/    ServerName mail.sxkj.com</VirtualHost>

[root@mail squirrelmail]# service httpd restartStopping httpd:                                            [  OK  ]Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using mail.sxkj.com for ServerName                                                           [  OK  ][root@mail squirrelmail]# service mysqld restartStopping mysqld:                                           [  OK  ]Starting mysqld:                                           [  OK  ]