Linux搭建Postfix邮件服务器

Vm虚拟机安装CentOs7系统
CentOs7的IP地址：192.168.81.133
Win7客户端(测试用),有Xshell或者SecureCRT工具

CentOs7下搭建Postfix邮件服务器，配置域名服务远程登录访问，新建用个测试用户(sent,recv)，两个用户用telnet命令登录邮件服务器，实现两个用户的邮件互发，并

准备工作
搭建DNS服务   
搭建Postfix和dovecot服务
Telnet的安装和配置
远程登录并实现两个用户邮件互发
WebMail的搭建和验证

systemctl stop firewalld
systemctl disable firewalld

setenforce 0

yum install bind -y

vim /etc/named.conf

vim /etc/named.rfc1912.zones

cp -p /var/named/named.localhost /var/named/duiyi.com.zone

vim /var/named/duiyi.com.zone

named-checkconf

systemctl start named
systemctl enable named

vim /etc/resolv.conf

nslookup mail.duiyi.com

rpm -q postfix

vim /etc/postfix/main.cf 

75行：myhostname = mail.duiyi.com              //本机主机名

83行：mydomain = duiyi.com                     //服务器域名

99行：myorigin = $mydomain                     //初始域名

164行：mydestination = $myhostname,$mydomain   //目标域

419 home_mailbox = Maildir/                   //邮件目录，在用户家目录下

postfix check

systemctl start postfix
systemctl enable postfix

yum install dovecot -y

vim /etc/dovecot/dovecot.conf

14行：protocols = imap pop3 lmtp                   //支持的电子邮件协议

26行：disable_plaintext_auth = no                  //允许用户明文登录（这个需要自己手动添加）

49行：login_trusted_networks = 192.168.81.133/24   //服务器的ip/24

vim /etc/dovecot/conf.d/10-mail.conf

24行： mail_location = maildir:~/Maildir           //服务器电子邮件保存的目录

systemctl restart  dovecot
systemctl enable   dovecot

useradd sent
passwd sent
useradd recv
passwd recv

ls /home

yum install telnet telnet -y
yum install telnet telnet-server -y

yum install xinetd -y

vim  /etc/xinetd.d/telnet

service telnet
{
   flags              = REUSE
   socket_type        = stream
   wait               = no
   user               = root
   server             = /usr/sbin/in.telnetd
   log_on_failure     += USERID 
   disable            = no                      #将语句 disable = yes 改为 disable = no
}        

systemctl restart xinetd

netstat -tnl | grep 23 

控制面板->程序->程序和功能->启动或关闭Windows功能->Telnet客户端  勾选并确定

telnet sent@mail.duiyi.com

telnet recv@mail.duiyi.com

echo "this is a mail " | mail -s "mail"  recv@duiyi.com

yum install squirrelmail –y

cd /var/www/html/
ln -s /usr/share/squirrelmail/ mail

cd /var/www/html/mail/config
./conf.pl

vim /etc/httpd/conf/httpd.conf  +316