使用Postfix与Dovecot部署一个可收发的邮件系统

1.配置dns:
[[email protected] named]# yum install -y bind
1)firewall处理
[[email protected] ~]# firewall-cmd --permanent --add-service=dns
[[email protected] ~]# firewall-cmd --permanent --reload
2）主配置文件
[[email protected] ~]# vim /etc/named.conf

检查语法：
3）区域配置文件
[[email protected] ~]# vim /etc/named.rfc1912.zones

4）数据配置文件
[[email protected] ~]# cd /var/named
[[email protected] named]# cp -a named.localhost openlab.aaa.zone

测试：
[[email protected] named]# yum install bind-utils -y

2.配置发送邮件服务器Postfix
关掉firewalld&selinux

[[email protected] ~]# systemctl stop firewalld
[[email protected] ~]# Setenforce 0

1）安装软件postfix
[[email protected] ~]# rpm -qa postfix
postfix-2.10.1-6.el7.x86_64
2）配置main.cf
[[email protected] ~]# hostnamectl --static set-hostname mail.openlab.aaa
[[email protected] ~]# cp /etc/postfix/main.cf{,.bak}
[[email protected] ~]# vim /etc/postfix/main.cf
75 myhostname = mail.openlab.aaa 设置posfix的FQDN合格域名（FQDN：(Fully Qualified Domain Name)全限定域名：同时带有主机名和域名的名称）
83 mydomain = openlab.aaa 设置运行posfix主机的域名
99 myorigin = $mydomain
116 inet_interfaces = all 监听的网络接口
164 #mydestination = $myhostname, localhost.$myhostname,localhost.mydomain, localhost
166 mydestination = $myhostname, localhost.$myhostname,localhost.mydomain, localhost, $mydomain,mail.$mydomain,mail.mydomain, www.$mydomain, ftp.$mydomain,ftp.myd omain
263 mynetworks = 192.168.233.0/24, 127.0.0.0/8 允许邮件服务的网段
295 relay_domains = $mydestination
418 home_mailbox = Maildir/

3）启动服务
语法检查：postfix check

测试：
1）创建两个用户tom和bob
[[email protected] ~]# useradd tom
[[email protected] ~]# echo 123 | passwd --stdin tom
[[email protected] ~]# useradd bob
[[email protected] ~]# echo 123 | passwd --stdin bob
2）使用telnet工具发送测试邮件
[[email protected] ~]# yum install telnet -y
[[email protected] ~]# telnet localhost 25
Trying ::1…
Connected to localhost.
Escape character is ‘^]’.
220 mail.openlab.aaa ESMTP Postfix
helo bob 宣告客户地址
250 mail.openlab.aaa
mail from:tom 发件人地址
250 2.1.0 Ok
rcpt to:bob 收件人地址
250 2.1.5 Ok
data 传送数据（信件）内容
354 End data with .
subject:test mail 邮件主题
hello! miss you~~~ 邮件内容
.
250 2.0.0 Ok: queued as 9A49962211AE
quit
221 2.0.0 Bye
Connection closed by foreign host.
3）检查邮件

3.配置接收邮件服务器Dovecot
1）安装软件 断开在连接主机名更改
[[email protected] ~]# yum install -y dovecot

2）配置dovecot
步骤1:要启用最基本的Devocot服务,需对文件/etc/dovecot/dovecot.conf
[[email protected] ~]# cp /etc/dovecot/dovecot.conf{,.bak}
[[email protected] ~]# vim /etc/dovecot/dovecot.conf
24 protocols = imap pop3 lmtp
30 listen = *
48 login_trusted_networks = 192.168.233.0/24

步骤2:对/etc/dovecot/conf.d/10-mail.conf配置文件作如下修改:
[[email protected] ~]# vim /etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir

3）启动服务
[[email protected] ~]# systemctl --now enable dovecot

测试：使用telnet接收邮件测试